fix($parse): remove references to last arguments to a fn call

This can be an issue if running (and killing) multiple apps/injectors on
the same page. The `args` array holds references to all previous arguments
to a function call and thus they cannot be garbage-collected.

In a regular (one app/injector on a page) app, this is not an issue.

Closes #10894

Author: vojtajina

src/ng/parse.js

@@ -728,6 +728,11 @@ Parser.prototype = {
             ? fn.apply(context, args)
             : fn(args[0], args[1], args[2], args[3], args[4]);
 
+      if (args) {
+        // Free-up the memory (arguments of the last function call).
+        args.length = 0;
+      }
+
       return ensureSafeObject(v, expressionText);
       };
   },