This introduces {GetContainingWasmFunction} to replace the above method,
since calculating offsets into the wire bytes is independent of the
concrete module object and hence only needs the shared decoded module.

R=clemensh@chromium.org
BUG=v8:6847

Change-Id: I145d527506289686653979dbb135480cc42ea4c8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1809369
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63870}