The TryInfo is allocated in the zone and its destructor is never
called, so the catch_label allocated on the heap is never freed.
Add the Label as a non-pointer field of the TryInfo instead.

R=clemensb@chromium.org

Bug: chromium:1184925
Change-Id: Ic0246d15a6474c56a78f167eba51caca9ec5b453
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2739645
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73225}