Chore: Exclude integration tests from running on test-backend step (#50359)

* Chore: Exclude integration tests from running on test-backend step

* Remove -v from go test command

* Add check to skip integration tests before each integration test

* Try to restart pipeline

* Retrying to make pipeline run

pkg/services/ngalert/store/instance_database_test.go

@@ -25,6 +25,9 @@ func mockTimeNow() {
 }
 
 func TestIntegrationAlertInstanceOperations(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping integration test")
+	}
 	ctx := context.Background()
 	_, dbstore := tests.SetupTestEnv(t, baseIntervalSeconds)