Add permissions for ML team (#8500)

Author: rolf-moz

sql/moz-fx-data-shared-prod/telemetry_derived/newtab_merino_propensity_v1/metadata.yaml

@@ -5,6 +5,11 @@ description: |-
 owners:
 - [email protected]
 - [email protected]
+workgroup_access:
+- role: roles/bigquery.dataViewer
+  members:
+  - workgroup:mozsoc-ml/service
+  - workgroup:mozsoc-ml/developers
 labels:
   incremental: false
   owner: cbeck