Add new_zeros dtype variant to the shim and as a stable op (#161597)

In case we want this before 2.9
Pull Request resolved: https://github.com/pytorch/pytorch/pull/161597
Approved by: https://github.com/mikaylagawarecki

torchgen/aoti/fallback_ops.py

@@ -187,4 +187,5 @@ aten_shimified_ops: dict[str, dict[str, list[str]]] = {
     "aten.narrow.default": {},
     "aten.amax.default": {},
     "aten.new_empty.default": {},
+    "aten.new_zeros.default": {},
 }