QuotaService: refactor to use ReplDB for Get queries (#91333)

* Feature (quota service): Use ReplDB for quota service Gets

This adds the replDB to the quota service, as well as some more test helper functions to simplify updating tests. My intent is that the helper functions can be removed when this is fully rolled out (or not) and we're consistently using the ReplDB interface (or not!)

* test updates

pkg/tests/api/plugins/api_plugins_test.go

@@ -193,17 +193,17 @@ func TestIntegrationPluginAssets(t *testing.T) {
 	})
 }
 
-func createUser(t *testing.T, db db.DB, cfg *setting.Cfg, cmd user.CreateUserCommand) {
+func createUser(t *testing.T, store db.DB, cfg *setting.Cfg, cmd user.CreateUserCommand) {
 	t.Helper()
 
 	cfg.AutoAssignOrg = true
 	cfg.AutoAssignOrgId = 1
 
-	quotaService := quotaimpl.ProvideService(db, cfg)
-	orgService, err := orgimpl.ProvideService(db, cfg, quotaService)
+	quotaService := quotaimpl.ProvideService(db.FakeReplDBFromDB(store), cfg)
+	orgService, err := orgimpl.ProvideService(store, cfg, quotaService)
 	require.NoError(t, err)
 	usrSvc, err := userimpl.ProvideService(
-		db, orgService, cfg, nil, nil, tracing.InitializeTracerForTest(),
+		store, orgService, cfg, nil, nil, tracing.InitializeTracerForTest(),
 		quotaService, supportbundlestest.NewFakeBundleService(),
 	)
 	require.NoError(t, err)