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>

cmd/migrate_storage_test.go

@@ -4,7 +4,6 @@
 package cmd
 
 import (
-	"context"
 	"os"
 	"strings"
 	"testing"
@@ -53,7 +52,7 @@ func TestMigratePackages(t *testing.T) {
 	assert.NotNil(t, v)
 	assert.NotNil(t, f)
 
-	ctx := context.Background()
+	ctx := t.Context()
 
 	p := t.TempDir()