fix(bump): manual version bump if prerelease offset is configured

If you use the prerelase offset in the .cz.toml, as in the following
example, no bump with a manual version number is possible.

The error occurs when bumping with manual version number:
cz  bump 9.8.7
--prerelease-offset cannot be combined with MANUAL_VERSION

```toml
[tool.commitizen]
changelog_incremental = true
tag_format = "v$version"
update_changelog_on_bump = true
version = "1.2.0b13"
prerelease_offset = 1
```

Author: ckagerer

commitizen/commands/bump.py

@@ -187,11 +187,6 @@ def __call__(self) -> None:  # noqa: C901
                     "--major-version-zero cannot be combined with MANUAL_VERSION"
                 )
 
-            if prerelease_offset:
-                raise NotAllowed(
-                    "--prerelease-offset cannot be combined with MANUAL_VERSION"
-                )
-
             if get_next:
                 raise NotAllowed("--get-next cannot be combined with MANUAL_VERSION")
 

docs/commands/bump.md

@@ -599,7 +599,7 @@ post_bump_hooks = [
 
 ### `prerelease_offset`
 
-Offset with which to start counting prereleses.
+Offset with which to start counting prereleases.
 
 Defaults to: `0`
 

tests/commands/test_bump_command.py

@@ -1041,23 +1041,6 @@ def test_bump_with_hooks_and_increment(mocker: MockFixture, tmp_commitizen_proje
     assert tag_exists is True
 
 
-@pytest.mark.usefixtures("tmp_commitizen_project")
-def test_bump_manual_version_disallows_prerelease_offset(mocker):
-    create_file_and_commit("feat: new file")
-
-    manual_version = "0.2.0"
-    testargs = ["cz", "bump", "--yes", "--prerelease-offset", "42", manual_version]
-    mocker.patch.object(sys, "argv", testargs)
-
-    with pytest.raises(NotAllowed) as excinfo:
-        cli.main()
-
-    expected_error_message = (
-        "--prerelease-offset cannot be combined with MANUAL_VERSION"
-    )
-    assert expected_error_message in str(excinfo.value)
-
-
 @pytest.mark.usefixtures("tmp_git_project")
 def test_bump_use_version_provider(mocker: MockFixture):
     mock = mocker.MagicMock(name="provider")