fix(ci): run xarray's backend tests from their new package - #4491

fix(ci): run xarray's backend tests from their new package#4491

d-v-b merged 2 commits into

zarr-developers:mainzarr-developers/zarr-python:mainfrom

d-v-b:fix/downstream-xarray-test-layoutd-v-b/zarr-python:fix/downstream-xarray-test-layoutCopy head branch name to clipboard