Replace check for integration tests. (#110707)

* Replace check for integration tests.
* Revert changes in pkg/tsdb/mysql packages.
* Fix formatting of few tests.

pkg/services/preference/prefimpl/xorm_store_test.go

@@ -4,12 +4,12 @@ import (
 	"testing"
 
 	"github.com/grafana/grafana/pkg/infra/db"
+	"github.com/grafana/grafana/pkg/util/testutil"
 )
 
 func TestIntegrationXORMPreferencesDataAccess(t *testing.T) {
-	if testing.Short() {
-		t.Skip("skipping integration test")
-	}
+	testutil.SkipIntegrationTestInShortMode(t)
+
 	testIntegrationPreferencesDataAccess(t, func(ss db.DB) store {
 		return &sqlStore{db: ss}
 	})