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/sqlstore/sqlstore_test.go

@@ -14,6 +14,7 @@ import (
 	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	"github.com/grafana/grafana/pkg/services/org"
 	"github.com/grafana/grafana/pkg/setting"
+	"github.com/grafana/grafana/pkg/util/testutil"
 )
 
 func TestMain(m *testing.M) {
@@ -24,9 +25,8 @@ func TestMain(m *testing.M) {
 }
 
 func TestIntegrationIsUniqueConstraintViolation(t *testing.T) {
-	if testing.Short() {
-		t.Skip("skipping integration test in short mode")
-	}
+	testutil.SkipIntegrationTestInShortMode(t)
+
 	store, _ := InitTestDB(t)
 
 	testCases := []struct {