SQL: Add sql template test helper (#91953)

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

@@ -0,0 +1,8 @@
+SELECT org_user.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 "user" as u JOIN org_user ON u.id = org_user.user_id
+ WHERE org_user.org_id = 0 
+   AND u.is_service_account = FALSE
+   AND uid = 'abc'
+ ORDER BY u.id asc
+ LIMIT 0