[Bug]: Pre-release daily workflows failing with zarr 3.0.0a0 about hdmf-zarr

[rly]

Attempting to fix this proved to be more than a few minutes of import changes. The Zarr Python API changes quite a bit from v2 to v3, and it seems like some things that we use like ProcessSynchronizer and ThreadSynchronizer have been removed/replaced. I haven't looked deeply into it yet. But for now, I think we should limit zarr<3 until we can provide proper zarr-python v3 support

[oruebel]

some things that we use like ProcessSynchronizer and ThreadSynchronizer have been removed/replaced.

The main part where the synchronizers come in is in how we open the file:

hdmf-zarr/src/hdmf_zarr/backend.py

Line 158 in 58e2d45

def open(self):

and then that is being configured in the __init__ is here:

hdmf-zarr/src/hdmf_zarr/backend.py

Lines 109 to 116 in 58e2d45

	if isinstance(synchronizer, bool):
	if synchronizer:
	sync_path = tempfile.mkdtemp()
	self.__synchronizer = zarr.ProcessSynchronizer(sync_path)
	else:
	self.__synchronizer = None
	else:
	self.__synchronizer = synchronizer

We are really not doing anything special with the synchronizers and in most common cases, I think the synchronizer is not being used (I think this mainly comes in for parallel I/O). So if we need to update this for Zarr 3, I think we should be able doable to keep the changes centered around file open logic.