Use test context in tests and new loop system in benchmarks (#33648)

Replace all contexts in tests with go1.24 t.Context()

---------

Co-authored-by: Giteabot <teabot@gitea.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

services/migrations/onedev_test.go

@@ -4,7 +4,6 @@
 package migrations
 
 import (
-	"context"
 	"net/http"
 	"net/url"
 	"testing"
@@ -22,7 +21,7 @@ func TestOneDevDownloadRepo(t *testing.T) {
 	}
 
 	u, _ := url.Parse("https://code.onedev.io")
-	ctx := context.Background()
+	ctx := t.Context()
 	downloader := NewOneDevDownloader(ctx, u, "", "", "go-gitea-test_repo")
 	if err != nil {
 		t.Fatalf("NewOneDevDownloader is nil: %v", err)