Add package_type = "virtual_system" to FakePackage

[maresb]

I hope that this solves #202.

The tests are taking forever when I run locally.

They finally finished and apart from one concerning error, it looks like I just have to update some of the expected hash values.

The concerning error

./tests/test_conda_lock.py::test_run_with_channel_inversion Failed: [undefined]conda_lock.vendor.poetry.utils._compat.CalledProcessError: Command '['/home/mares/micromamba/condabin/mamba', 'create', '--prefix', '/tmp/tmpuglh4xow/prefix', '--dry-run', '--json', '--override-channels', '--channel', 'rapidsai', '--channel', 'nvidia', '--channel', 'conda-forge', '--channel', 'file:///tmp/tmpe6vs4lv8', 'cudf', 'conda-forge::cuda-python']' returned non-zero exit status 1.
monkeypatch = <_pytest.monkeypatch.MonkeyPatch object at 0x7f4f823d6e30>
channel_inversion = PosixPath('/tmp/pytest-of-mares/pytest-10/test_run_with_channel_inversio0/environment.yaml')
mamba_exe = PosixPath('/home/mares/micromamba/condabin/mamba')

    def test_run_with_channel_inversion(
        monkeypatch: "pytest.MonkeyPatch", channel_inversion: Path, mamba_exe: str
    ):
        """Given that the cuda_python package is available from a few channels
        and three of those channels listed
        and with conda-forge listed as the lowest priority channel
        and with the cuda_python dependency listed as "conda-forge::cuda_python",
        ensure that the lock file parse picks up conda-forge as the channel and not one of the higher priority channels
        """
        monkeypatch.chdir(channel_inversion.parent)
>       run_lock([channel_inversion], conda_exe=mamba_exe, platforms=["linux-64"])

/home/mares/repos/conda-lock/tests/test_conda_lock.py:692: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/home/mares/repos/conda-lock/conda_lock/conda_lock.py:950: in run_lock
    make_lock_files(
/home/mares/repos/conda-lock/conda_lock/conda_lock.py:389: in make_lock_files
    lock_content = lock_content | create_lockfile_from_spec(
/home/mares/repos/conda-lock/conda_lock/conda_lock.py:738: in create_lockfile_from_spec
    deps = _solve_for_arch(
/home/mares/repos/conda-lock/conda_lock/conda_lock.py:689: in _solve_for_arch
    conda_deps = solve_conda(
/home/mares/repos/conda-lock/conda_lock/conda_solver.py:169: in solve_conda
    dry_run_install = solve_specs_for_arch(
/home/mares/repos/conda-lock/conda_lock/conda_solver.py:356: in solve_specs_for_arch
    proc.check_returncode()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = CompletedProcess(args=['/home/mares/micromamba/condabin/mamba', 'create', '--prefix', '/tmp/tmpuglh4xow/prefix', '--dr...kage cuda-python-11.7.1-py39h1eff087_0 is excluded by strict repo priority\n\n{\n    "success": false\n}\n', stderr='')

    def check_returncode(self):
        """Raise CalledProcessError if the exit code is non-zero."""
        if self.returncode:
>           raise CalledProcessError(
                self.returncode, self.args, self.stdout, self.stderr
            )
E           conda_lock.vendor.poetry.utils._compat.CalledProcessError: Command '['/home/mares/micromamba/condabin/mamba', 'create', '--prefix', '/tmp/tmpuglh4xow/prefix', '--dry-run', '--json', '--override-channels', '--channel', 'rapidsai', '--channel', 'nvidia', '--channel', 'conda-forge', '--channel', 'file:///tmp/tmpe6vs4lv8', 'cudf', 'conda-forge::cuda-python']' returned non-zero exit status 1.

/home/mares/repos/conda-lock/conda_lock/vendor/poetry/utils/_compat.py:168: CalledProcessError

Let's see how it looks on the CI...

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[maresb]

The "concerning error" above occurs also without package_type = "virtual_system".

[maresb]

@mariusvniekerk looks like I got it!!! 🎉

Closes #202, fixing broken tests