We fix an inconsistency where supertype arrays for wasm-gc object maps
were not always allocated in old space. To do so we add an
AllocationType argument to a couple of factory helpers.

Bug: v8:7748
Change-Id: I8b16032b8504c17e0f730cfc86e30b172645b67b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3320455Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78285}