Replace interface{} with any (#25686) (#25687)

Same perl replacement as https://github.com/go-gitea/gitea/pull/25686
but for 1.20 to ease future backporting.

modules/git/foreachref/parser_test.go

@@ -217,7 +217,7 @@ func TestParser(t *testing.T) {
 	}
 }
 
-func pretty(v interface{}) string {
+func pretty(v any) string {
 	data, err := json.MarshalIndent(v, "", "  ")
 	if err != nil {
 		// shouldn't happen