Replace check for integration tests. (#110707)

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

pkg/tsdb/grafana-postgresql-datasource/postgres_snapshot_test.go

@@ -17,6 +17,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/grafana/grafana/pkg/tsdb/grafana-postgresql-datasource/sqleng"
+	"github.com/grafana/grafana/pkg/util/testutil"
 )
 
 var updateGoldenFiles = false
@@ -30,11 +31,9 @@ var updateGoldenFiles = false
 // Use the docker/blocks/postgres_tests/docker-compose.yaml to spin up a
 // preconfigured Postgres server suitable for running these tests.
 func TestIntegrationPostgresSnapshots(t *testing.T) {
-	// the logic in this function is copied from postgres_tests.go
-	if testing.Short() {
-		t.Skip("skipping integration test in short mode")
-	}
+	testutil.SkipIntegrationTestInShortMode(t)
 
+	// the logic in this function is copied from postgres_tests.go
 	shouldRunTest := func() bool {
 		if testing.Short() {
 			return false