[vm] Add (Zone*) overload for Object::ZoneHandle()
[vm] Add (Zone*) overload for Object::ZoneHandle()

This aligns the overloads for ZoneHandle() in Object to match those
available in other classes.

Change-Id: I92ea915699b96966d67a030f011b371ea88ee756
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/113180
Reviewed-by: Clement Skau <495593248b6158163719b90dde8357b589c8e5d0@google.com>
Commit-Queue: Teagan Strickland <cce218d042444252b7ac446d60910fca7732559c@google.com>

dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-lang/sdk