Pipenv selects wrong PyPi repository for private packages with non canonical names

### Issue description

Let's assume that we have a package 'some-cool-package-name'. Pip allows non-canonical names using underscores. In this particular case it would look like 'some_cool_package_name`

if the package is located in private PyPi index than pipenv would select default index during creating a lock. That would create problems with locking.

### The reason of the problem
In this file we normalize the names of packages:
https://github.com/pypa/pipenv/blob/main/pipenv/patched/pip/_internal/resolution/resolvelib/factory.py#L250

And we pass normalized name to finder:
https://github.com/pypa/pipenv/blob/main/pipenv/patched/pip/_internal/resolution/resolvelib/factory.py#L284

Here we get the repository of packages by package name:
https://github.com/pypa/pipenv/blob/8e0608593a1c65439ada455a7980050c9e4efbe0/pipenv/patched/pip/_internal/models/search_scope.py#L142

Here you can see how we create mapping between package name and repository:
https://github.com/pypa/pipenv/blob/8e0608593a1c65439ada455a7980050c9e4efbe0/pipenv/utils/resolver.py#L319

But there we create mapping between package name and repository. (Pay attention that here we don't use normalized package name)

### Expected result

Pipenv should be able to work with packages that have non-canonical names.

### Actual result

Pipenv has a problem with locking non-canonical names

### Steps to replicate
```
pipenv install -d 
```

```
[[source]]
url = "https://pypi.org/simple"
verify_ssl = true
name = "pypi"

[[source]]
url = "https://test.pypi.org/simple"
verify_ssl = true
name = "testpypi"

[packages]
pipenv_test_private_package = {version = "*", index = "testpypi"}
```

Stack trace:
```
Pipfile.lock not found, creating...
Locking [packages] dependencies...
Building requirements...
Resolving dependencies...
✘ Locking Failed!
⠸ Locking...False
CRITICAL:pipenv.patched.pip._internal.resolution.resolvelib.factory:Could not find a version that satisfies the requirement pipenv_test_private_package (from versions: none)
[ResolutionFailure]:   File "~/.venv/lib/python3.10/site-packages/pipenv/resolver.py", line 645, in _main
[ResolutionFailure]:       resolve_packages(
[ResolutionFailure]:   File "~/.venv/lib/python3.10/site-packages/pipenv/resolver.py", line 612, in resolve_packages
[ResolutionFailure]:       results, resolver = resolve(
[ResolutionFailure]:   File "~/.venv/lib/python3.10/site-packages/pipenv/resolver.py", line 592, in resolve
[ResolutionFailure]:       return resolve_deps(
[ResolutionFailure]:   File "~/.venv/lib/python3.10/site-packages/pipenv/utils/resolver.py", line 908, in resolve_deps
[ResolutionFailure]:       results, hashes, internal_resolver = actually_resolve_deps(
[ResolutionFailure]:   File "~/.venv/lib/python3.10/site-packages/pipenv/utils/resolver.py", line 681, in actually_resolve_deps
[ResolutionFailure]:       resolver.resolve()
[ResolutionFailure]:   File "~/.venv/lib/python3.10/site-packages/pipenv/utils/resolver.py", line 442, in resolve
[ResolutionFailure]:       raise ResolutionFailure(message=str(e))
[pipenv.exceptions.ResolutionFailure]: Warning: Your dependencies could not be resolved. You likely have a mismatch in your sub-dependencies.
  You can use $ pipenv run pip install <requirement_name> to bypass this mechanism, then run $ pipenv graph to inspect the versions actually installed in the virtualenv.
  Hint: try $ pipenv lock --pre if it is a pre-release dependency.
ERROR: No matching distribution found for pipenv_test_private_package

Traceback (most recent call last):
  File "~/.venv/bin/pipenv", line 8, in <module>
    sys.exit(cli())
  File "~/.venv/lib/python3.10/site-packages/pipenv/vendor/click/core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
  File "~/.venv/lib/python3.10/site-packages/pipenv/cli/options.py", line 58, in main
    return super().main(*args, **kwargs, windows_expand_args=False)
  File "~/.venv/lib/python3.10/site-packages/pipenv/vendor/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
  File "~/.venv/lib/python3.10/site-packages/pipenv/vendor/click/core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "~/.venv/lib/python3.10/site-packages/pipenv/vendor/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "~/.venv/lib/python3.10/site-packages/pipenv/vendor/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
  File "~/.venv/lib/python3.10/site-packages/pipenv/vendor/click/decorators.py", line 92, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "~/.venv/lib/python3.10/site-packages/pipenv/vendor/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
  File "~/.venv/lib/python3.10/site-packages/pipenv/cli/command.py", line 209, in install
    do_install(
  File "~/.venv/lib/python3.10/site-packages/pipenv/routines/install.py", line 164, in do_install
    do_init(
  File "~/.venv/lib/python3.10/site-packages/pipenv/routines/install.py", line 672, in do_init
    do_lock(
  File "~/.venv/lib/python3.10/site-packages/pipenv/routines/lock.py", line 65, in do_lock
    venv_resolve_deps(
  File "~/.venv/lib/python3.10/site-packages/pipenv/utils/resolver.py", line 849, in venv_resolve_deps
    c = resolve(cmd, st, project=project)
  File "~/.venv/lib/python3.10/site-packages/pipenv/utils/resolver.py", line 718, in resolve
    raise RuntimeError("Failed to lock Pipfile.lock!")
RuntimeError: Failed to lock Pipfile.lock!
```

-------------------------------------------------------------------------------

<details><summary>$ pipenv --support</summary>

Pipenv version: `'2023.11.15'`

Pipenv location: `'/.venv/lib/python3.10/site-packages/pipenv'`

Python location: `'/.venv/bin/python3.10'`

OS Name: `'posix'`

User pip version: `'23.3.1'`

user Python installations found:


PEP 508 Information:

```
{'implementation_name': 'cpython',
 'implementation_version': '3.10.4',
 'os_name': 'posix',
 'platform_machine': 'x86_64',
 'platform_python_implementation': 'CPython',
 'platform_release': '5.15.0-91-generic',
 'platform_system': 'Linux',
 'platform_version': '#101~20.04.1-Ubuntu SMP Thu Nov 16 14:22:28 UTC 2023',
 'python_full_version': '3.10.4',
 'python_version': '3.10',
 'sys_platform': 'linux'}
```

System environment variables:

  - `SHELL`
  - `SESSION_MANAGER`
  - `QT_ACCESSIBILITY`
  - `PIPENV_VENV_IN_PROJECT`
  - `COLORTERM`
  - `XDG_CONFIG_DIRS`
  - `NVM_INC`
  - `XDG_MENU_PREFIX`
  - `GNOME_DESKTOP_SESSION_ID`
  - `LC_ADDRESS`
  - `GNOME_SHELL_SESSION_MODE`
  - `LC_NAME`
  - `SSH_AUTH_SOCK`
  - `ADFS_USER`
  - `XMODIFIERS`
  - `DESKTOP_SESSION`
  - `LC_MONETARY`
  - `SSH_AGENT_PID`
  - `PTC_ARTIFACTORY_TOKEN`
  - `EDITOR`
  - `GTK_MODULES`
  - `SYS_DST_APPROVER_STASH_TOKEN`
  - `PWD`
  - `AD_USERNAME`
  - `LOGNAME`
  - `XDG_SESSION_DESKTOP`
  - `XDG_SESSION_TYPE`
  - `GPG_AGENT_INFO`
  - `SYSTEM_USER`
  - `XAUTHORITY`
  - `GJS_DEBUG_TOPICS`
  - `WINDOWPATH`
  - `SNYK_TOKEN`
  - `HOME`
  - `USERNAME`
  - `IM_CONFIG_PHASE`
  - `LC_PAPER`
  - `LANG`
  - `LS_COLORS`
  - `XDG_CURRENT_DESKTOP`
  - `VTE_VERSION`
  - `ARTIFACTORY_PASSWORD`
  - `GNOME_TERMINAL_SCREEN`
  - `MARVIN_JENKINS_PASSWORD`
  - `INVOCATION_ID`
  - `MANAGERPID`
  - `GOROOT`
  - `SYS_DST_ROBOT_STASH_TOKEN`
  - `GJS_DEBUG_OUTPUT`
  - `NVM_DIR`
  - `LESSCLOSE`
  - `XDG_SESSION_CLASS`
  - `MARVIN_JENKINS_USER`
  - `TERM`
  - `LC_IDENTIFICATION`
  - `DST_ARTIFACTORY_TOKEN`
  - `LESSOPEN`
  - `USER`
  - `GNOME_TERMINAL_SERVICE`
  - `VISUAL`
  - `DISPLAY`
  - `SHLVL`
  - `NVM_CD_FLAGS`
  - `LC_TELEPHONE`
  - `QT_IM_MODULE`
  - `LC_MEASUREMENT`
  - `ARTIFACTORY_USERNAME`
  - `XDG_RUNTIME_DIR`
  - `ARTIFACTORY_TOKEN`
  - `LC_TIME`
  - `PTC_STASH_TOKEN`
  - `RAPID7_TOKEN`
  - `JOURNAL_STREAM`
  - `XDG_DATA_DIRS`
  - `PATH`
  - `GDMSESSION`
  - `DBUS_SESSION_BUS_ADDRESS`
  - `NVM_BIN`
  - `LC_NUMERIC`
  - `OLDPWD`
  - `GOPATH`
  - `_`
  - `PIP_DISABLE_PIP_VERSION_CHECK`
  - `PYTHONDONTWRITEBYTECODE`
  - `PYTHONFINDER_IGNORE_UNSUPPORTED`

Pipenv–specific environment variables:

 - `PIPENV_VENV_IN_PROJECT`: `True`

Debug–specific environment variables:

  - `PATH`: `/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/usr/local/go/bin:/home/UNKNOWN/dev/bin:/home/UNKNOWN/.local/bin/:/opt/python/3.7.9/bin/`
  - `SHELL`: `/bin/bash`
  - `EDITOR`: `vim`
  - `LANG`: `en_US.UTF-8`
  - `PWD`: `/`


---------------------------

Contents of `Pipfile` ('/Pipfile'):

```toml
[[source]]
url = "https://pypi.org/simple"
verify_ssl = true
name = "pypi"

[[source]]
url = "https://test.pypi.org/simple"
verify_ssl = true
name = "testpypi"

[packages]
pipenv_test_private_package = {version = "*", index = "testpypi"}

```

</details>


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Pipenv selects wrong PyPi repository for private packages with non canonical names #6056

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Uh oh!

Pipenv selects wrong PyPi repository for private packages with non canonical names #6056

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