Move kernel baseline tests to front_end.

pkg/front_end/testcases/call.dart

 class Callable {
   call(x) {
     return "string";
   }
 }
 
 class CallableGetter {
   get call => new Callable();
 }
 
@@ skipping 24 matching lines @@
   var nothing5 = callable();
   var nothing6 = callable.call();
   var nothing7 = callable.call.call();
   var nothing8 = callable.call.call.call();
 
   var nothing9 = callableGetter();
   var nothing10 = callableGetter.call();
   var nothing11 = callableGetter.call.call();
   var nothing12 = callableGetter.call.call.call();
 }