chore: make ansible test serial

[holmanb]

chore: make ansible test serial

Additional Context

Arguably we should modify the test, but for now just mark it as serial to fix the py3-fast tox env.

tox -e py3-fast

Merge type

• Squash merge using "Proposed Commit Message"
• Rebase and merge unique commits. Requires commit messages per-commit each referencing the pull request number (#<PR_NUM>)

[TheRealFalcon]

Weird. Invoking pytest -n auto manually works fine here.

[holmanb]

For future context the failure condition is this:

________________________________ TestAnsible.test_pip_bootstrap ________________________________
[gw3] linux -- Python 3.12.3 /home/holmanb/ci-e/.tox/py3-fast/bin/python

self = <tests.unittests.config.test_cc_ansible.TestAnsible object at 0x74d7eb544e30>
m_which = <MagicMock name='which' id='128470710989264'>
m_subp = <MagicMock name='subp' id='128470710298016'>

    @mock.patch(M_PATH + "subp.subp", return_value=("stdout", "stderr"))
    @mock.patch(M_PATH + "subp.which", return_value=False)
    def test_pip_bootstrap(self, m_which, m_subp):
        distro = get_cloud(mocked_distro=True).distro
        with mock.patch("builtins.__import__", side_effect=ImportError):
>           cc_ansible.AnsiblePullPip(distro, "ansible").install("")

tests/unittests/config/test_cc_ansible.py:338: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
cloudinit/config/cc_ansible.py:111: in install
    sysconfig.get_path("stdlib"), "EXTERNALLY-MANAGED"
/usr/lib/python3.12/sysconfig.py:672: in get_path
    return get_paths(scheme, vars, expand)[name]
/usr/lib/python3.12/sysconfig.py:662: in get_paths
    return _expand_vars(scheme, vars)
/usr/lib/python3.12/sysconfig.py:294: in _expand_vars
    _extend_dict(vars, get_config_vars())
/usr/lib/python3.12/sysconfig.py:765: in get_config_vars
    _init_config_vars()
/usr/lib/python3.12/sysconfig.py:706: in _init_config_vars
    _init_posix(_CONFIG_VARS)
/usr/lib/python3.12/sysconfig.py:572: in _init_posix
    _temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
/usr/lib/python3.12/unittest/mock.py:1134: in __call__
    return self._mock_call(*args, **kwargs)
/usr/lib/python3.12/unittest/mock.py:1138: in _mock_call
    return self._execute_mock_call(*args, **kwargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <MagicMock name='__import__' id='128470679590752'>
args = ('_sysconfigdata__x86_64-linux-gnu', {'_ALWAYS_STR': {'MACOSX_DEPLOYMENT_TARGET'}, '_BASE_EXEC_PREFIX': '/usr', '_BASE.../py3-fast', 'exec_prefix': '/home/holmanb/ci-e/.tox/py3-fast', 'installed_base': '/usr', ...}}, ['build_time_vars'], 0)
kwargs = {}, effect = <class 'ImportError'>

    def _execute_mock_call(self, /, *args, **kwargs):
        # separate from _increment_mock_call so that awaited functions are
        # executed separately from their call, also AsyncMock overrides this method
    
        effect = self.side_effect
        if effect is not None:
            if _is_exception(effect):
>               raise effect
E               ImportError

/usr/lib/python3.12/unittest/mock.py:1193: ImportError