Add an implementation of compare ops which, like binary ops,
speculatively reads integers (but still returns a tagged true/false
value).

Bug: v8:7700
Change-Id: I38f0ba99f8f7af30c89d0b987e28483c9610463f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3657440
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80692}