v3 arrays have no .name attribute

[rabernat]

V2 arrays have a .name: https://zarr.readthedocs.io/en/stable/_autoapi/zarr.core.Array.html#zarr.core.Array.name

V3 arrays don't:

import zarr
arr = zarr.Array.create(store=zarr.store.MemoryStore(), shape=(10,), chunks=(5,), dtype="i4")
arr.name
# attribute error

It would be a pretty disruptive API change to remove this.

[jhamman]

I've started implementing this. PR coming soon.