db: refactor "action" table to use GORM (#7054)

Co-authored-by: deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>

internal/testutil/testutil.go

@@ -0,0 +1,13 @@
+// Copyright 2022 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package testutil
+
+import (
+	"os"
+	"strings"
+)
+
+// InTest is ture if the current binary looks like a test artifact.
+var InTest = len(os.Args) > 0 && strings.HasSuffix(strings.TrimSuffix(os.Args[0], ".exe"), ".test")