Additionally, the CL creates a BranchIfRootConstant node and updates
JumpIfTrue and JumpIfFalse.

Bug: v8:7700
Change-Id: I7ee98f4b726ffef0f7969231b598d6216b09ccfc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3769828Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81798}