Remove sub-path from container registry realm (#31293) (#31300)

Backport #31293 by wxiaoguang

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/test/utils.go

@@ -34,8 +34,10 @@ func IsNormalPageCompleted(s string) bool {
 	return strings.Contains(s, `<footer class="page-footer"`) && strings.Contains(s, `</html>`)
 }
 
-func MockVariableValue[T any](p *T, v T) (reset func()) {
+func MockVariableValue[T any](p *T, v ...T) (reset func()) {
 	old := *p
-	*p = v
+	if len(v) > 0 {
+		*p = v[0]
+	}
 	return func() { *p = old }
 }