The stability dependency should be taken on the primitive wrapper map,
not the primitive map (which is guaranteed to remain stable).

Note that the primitive wrapper map itself *also* stays stable; but
changing the position of the call here avoids having to think deeply
about this at all in the future.

Bug: v8:7790
Change-Id: I9b79b9df0d8d49f0c6249c6cd906142bda1ff5cd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3053578Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75906}