Raw hashes may need to be looked up via the forwarding table when
internalized strings are forwarded to external resources. Notably, the
megamorphic ICs were not correctly fetching the raw hash.

Bug: v8:12007
Change-Id: Ibbc75de57e707788f544fbd1a0f8f0041350e29d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3885379Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Patrick Thier <pthier@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83115}