SQLTemplate: Make Ident only work for identifiers (not any string) (#92387)

pkg/registry/apis/identity/legacy/testdata/postgres--query_users-users_uid.sql

@@ -1,6 +1,6 @@
 SELECT o.org_id, u.id, u.uid, u.login, u.email, u.name,
   u.created, u.updated, u.is_service_account, u.is_disabled, u.is_admin
-  FROM "grafana.user" as u JOIN "grafana.org_user" as o ON u.id = o.user_id
+  FROM "grafana"."user" as u JOIN "grafana"."org_user" as o ON u.id = o.user_id
  WHERE o.org_id = 0
    AND u.is_service_account = FALSE
    AND uid = 'abc'