Allow data_plane_name column insertions on select tables (#1621)

supabase/migrations/61_insert_data_plane_name.sql

@@ -0,0 +1,8 @@
+begin;
+
+grant insert (draft_id, dry_run, detail, data_plane_name) on publications to authenticated;
+
+grant insert (capture_name, connector_tag_id, data_plane_name, draft_id, endpoint_config, update_only)
+  on discovers to authenticated;
+
+commit;