Sync with zarr 3.0 rc-2

[mpiannucci]

@dcherian not sure if you already started on some of the xarray parts

Closes #541

[mpiannucci]

I have no idea how this figures:

UserWarning: The codec `vlen-utf8` is currently not part in the Zarr version 3 specification. It may not be supported by other zarr imple...

[mpiannucci]

Failures, that im currently not sure how to handle

FAILED tests/test_dask.py::test_distributed - TypeError: Expected an integer or an iterable of integers. Got None instead.
FAILED tests/test_dask.py::test_threaded - TypeError: Expected an integer or an iterable of integers. Got None instead.
FAILED tests/test_stateful_repo_ops.py::VersionControlTest::runTest - icechunk.IcechunkError: session error: cannot commit, no changes made to the session
FAILED tests/test_xarray.py::test_xarray_to_icechunk - TypeError: Expected an integer or an iterable of integers. Got None instead.
FAILED tests/test_zarr/test_stateful.py::test_zarr_hierarchy - hypothesis.errors.FlakyFailure: Inconsistent results: An example failed on the first run but now succeeds (or fails with another error, o...

[dcherian]

TypeError: Expected an integer or an iterable of integers. Got None instead.

This is some Xarray-Zarr incompatibility with the latest Zarr candidate

[mpiannucci]

Yeah think it possibly the change from chunk_shape to chunks in create_array

[mpiannucci]

zarr-developers/zarr-python#2627

[dcherian]

Is that relevant to the tuple thing too? Xarray doesn't use chunk_shape AFAICT

[mpiannucci]

hmmm i have no idea

[dcherian]

pydata/xarray#9927 is in so we can proceed here against Xarray main.

[mpiannucci]

I ran this against xarray main branch and now just get these warnings that are reported as errors:

FAILED tests/test_dask.py::test_distributed - UserWarning: The codec `vlen-utf8` is currently not part in the Zarr version 3 specification. It may not be supported by other zarr implementations and may change in the future.
FAILED tests/test_dask.py::test_threaded - UserWarning: The codec `vlen-utf8` is currently not part in the Zarr version 3 specification. It may not be supported by other zarr implementations and may change in the future.
FAILED tests/test_xarray.py::test_xarray_to_icechunk - UserWarning: The codec `vlen-utf8` is currently not part in the Zarr version 3 specification. It may not be supported by other zarr implementations and may change in the future.

[dcherian]

Then we need to copy https://github.com/pydata/xarray/blob/1e5045a8c56a93d83d9347abcc020be2bb3cf622/pyproject.toml#L339-L340

[mpiannucci]

For some reason, that filter isnt working what the heck

[mpiannucci]

Whyyyy isnt filterwarnings working what the heck

[mpiannucci]

The distributed failure is back! WTH