Move SkipIntegrationTestInShortMode to testutil. (#110750)

* Move SkipIntegrationTestInShortMode to testutil.

* make update-workspace

pkg/util/testutil/testutil.go

@@ -2,6 +2,7 @@ package testutil
 
 import (
 	"embed"
+	"strings"
 	"testing"
 	"time"
 )
@@ -28,3 +29,16 @@ func init() {
 		panic("importing testing libraries in runtime code is not allowed")
 	}
 }
+
+// SkipIntegrationTestInShortMode skips the integration test if it is running in short mode.
+// This function fails is the test is not an integration test as defined in Grafana (i.e. test
+// starting with TestIntegration prefix).
+func SkipIntegrationTestInShortMode(t testing.TB) {
+	t.Helper()
+	if !strings.HasPrefix(t.Name(), "TestIntegration") {
+		t.Fatal("test is not an integration test")
+	}
+	if testing.Short() {
+		t.Skip("skipping integration test in short mode")
+	}
+}