xla

4f4ddcb5 - Makes allowed tests a non-diff list, updates diff to handle dtypes (#1069)

Makes allowed tests a non-diff list, updates diff to handle dtypes (#1069) - makes allowed tests a non-diff list, - updates diff to handle new dtypes extension point - filters the half dtype test variants - changes discovery of test metadata to use an environment variable set in run_tests.sh - updates test metadata file name