Filter out Zarr's consolidated metadata (`.zmetadata`)

[jakirkham]

Currently there are a few metadata keys that get handled specially in the GDSStore (see below).

kvikio/python/kvikio/zarr.py

Lines 35 to 39 in 0251229

	if os.path.basename(fn) in [
	zarr.storage.array_meta_key,
	zarr.storage.group_meta_key,
	zarr.storage.attrs_key,
	]:

Though one that isn't handled currently is the consolidated metadata key (.zmetadata), which can show up for some Zarr stores.

Would be good to filter this one out too

[jakirkham]

cc @dcherian (who pointed this out to us :)