Revert "Python: skip flaky poetry spec with issue comment"

The associated ticket on Poetry
(python-poetry/poetry#3010) was closed because
the underlying triggers were mostly resolved in `poetry` `1.2` using the
new installer. In particular, see
python-poetry/poetry#3010 (comment).

We flipped to the new installer in
#5838, so this skip
should no longer be necessary.

This reverts commit ceb5700.

Additionally, this flips the fixture from a Python 2 to a Python 3
fixture. We dropped support for Python 2 a while ago, but didn't notice
this test needed updating because it was skipped.

Another test still needs a python 2 fixture to ensure that lockfiles
still pinned to python 2 throw the correct exception.

So copied the existing fixture, updated it to specify a python 3
version, and then regenerated the lockfile using:
```
PYENV_VERSION=3.10.7 pyenv exec poetry lock --no-update
```

python/spec/dependabot/python/file_updater/poetry_file_updater_spec.rb

@@ -80,11 +80,9 @@
         to start_with("8cea4ecb5b2230fbd4a33a67a4da004f1ccabad48352aaf040")
     end
 
-    # TODO: Fix flaky spec caused by an issue in poetry:
-    # https://github.com/python-poetry/poetry/issues/3010)
-    context "with a specified Python version" do
-      let(:pyproject_fixture_name) { "python_2.toml" }
-      let(:lockfile_fixture_name) { "python_2.lock" }
+    context "with a specified Python version", :slow do
+      let(:pyproject_fixture_name) { "python_310.toml" }
+      let(:lockfile_fixture_name) { "python_310.lock" }
 
       let(:dependency) do
         Dependabot::Dependency.new(
@@ -107,7 +105,7 @@
         )
       end
 
-      skip "updates the lockfile successfully" do
+      it "updates the lockfile successfully" do
         updated_lockfile = updated_files.find { |f| f.name == "pyproject.lock" }
 
         lockfile_obj = TomlRB.parse(updated_lockfile.content)

python/spec/fixtures/pyproject_files/python_310.toml

@@ -0,0 +1,12 @@
+[tool.poetry]
+name = "PythonProjects"
+version = "2.0.0"
+homepage = "https://github.com/roghu/py3_projects"
+license = "MIT"
+readme = "README.md"
+authors = ["Dependabot <support@dependabot.com>"]
+description = "Various small python projects."
+
+[tool.poetry.dependencies]
+python = "3.10.7"
+requests = "2.18.0"

python/spec/fixtures/pyproject_locks/python_310.lock

@@ -0,0 +1,80 @@
+[[package]]
+name = "certifi"
+version = "2022.9.24"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
+name = "chardet"
+version = "3.0.4"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "idna"
+version = "2.5"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "requests"
+version = "2.18.0"
+description = "Python HTTP for Humans."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+certifi = ">=2017.4.17"
+chardet = ">=3.0.2,<3.1.0"
+idna = ">=2.5,<2.6"
+urllib3 = ">=1.21.1,<1.22"
+
+[package.extras]
+security = ["cryptography (>=1.3.4)", "idna (>=2.0.0)", "pyOpenSSL (>=0.14)"]
+socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
+
+[[package]]
+name = "urllib3"
+version = "1.21.1"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.extras]
+secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "ipaddress", "pyOpenSSL (>=0.14)"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
+
+[metadata]
+lock-version = "1.1"
+python-versions = "3.10.7"
+content-hash = "f56ecb5b0d42f75b0c0992902acd1847a2f182b4088da95353f9bfbecc3308eb"
+
+[metadata.files]
+certifi = [
+    {file = "certifi-2022.9.24-py3-none-any.whl", hash = "sha256:90c1a32f1d68f940488354e36370f6cca89f0f106db09518524c88d6ed83f382"},
+    {file = "certifi-2022.9.24.tar.gz", hash = "sha256:0d9c601124e5a6ba9712dbc60d9c53c21e34f5f641fe83002317394311bdce14"},
+]
+chardet = [
+    {file = "chardet-3.0.4-py2.py3-none-any.whl", hash = "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"},
+    {file = "chardet-3.0.4.tar.gz", hash = "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"},
+]
+idna = [
+    {file = "idna-2.5-py2.py3-none-any.whl", hash = "sha256:cc19709fd6d0cbfed39ea875d29ba6d4e22c0cebc510a76d6302a28385e8bb70"},
+    {file = "idna-2.5.tar.gz", hash = "sha256:3cb5ce08046c4e3a560fc02f138d0ac63e00f8ce5901a56b32ec8b7994082aab"},
+]
+requests = [
+    {file = "requests-2.18.0-py2.py3-none-any.whl", hash = "sha256:5e88d64aa56ac0fda54e77fb9762ebc65879e171b746d5479a33c4082519d6c6"},
+    {file = "requests-2.18.0.tar.gz", hash = "sha256:cd0189f962787284bff715fddaad478eb4d9c15aa167bd64e52ea0f661e7ea5c"},
+]
+urllib3 = [
+    {file = "urllib3-1.21.1-py2.py3-none-any.whl", hash = "sha256:8ed6d5c1ff9d6ba84677310060d6a3a78ca3072ce0684cb3c645023009c114b1"},
+    {file = "urllib3-1.21.1.tar.gz", hash = "sha256:b14486978518ca0901a76ba973d7821047409d7f726f22156b24e83fd71382a5"},
+]