Test for `pytest -n 4` with `pytest xdist` with `dask_client` fixtures

[eddiebergman]

A recent PR #1417 added the following lines

auto-sklearn/test/fixtures/dask.py

Lines 10 to 24 in 415f144

	active_clients: dict[str, Callable] = {}
	@fixture(autouse=True)
	def clean_up_any_dask_clients(request: FixtureRequest) -> None:
	"""Auto injected fixture to close dask clients after each test"""
	yield
	if any(active_clients):
	for adr in list(active_clients.keys()):
	if request.config.getoption("verbose") > 1:
	print(f"\nFixture closing dask_client at {adr}")
	close = active_clients[adr]
	close()
	del active_clients[adr]

It's not sure how this interacts with parallelized pytest xdist as in theory, the fixture above, which is automatically run at the end of any test, will check to see if their are any clients and then close it. I imagine this will not parallelize.

[eddiebergman]

Fixed with #1434