Move jobparser from act repository to Gitea (#36699)

The jobparser sub package in act is only used by Gitea. Move it to Gitea
to make it more easier to maintain.

---------

Co-authored-by: Christopher Homberger <christopher.homberger@web.de>

modules/actions/jobparser/testdata_test.go

@@ -0,0 +1,21 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package jobparser
+
+import (
+	"embed"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+//go:embed testdata
+var testdata embed.FS
+
+func ReadTestdata(t *testing.T, name string) []byte {
+	content, err := testdata.ReadFile(filepath.Join("testdata", name))
+	require.NoError(t, err)
+	return content
+}