This reverts commit a3039123.

Reason for revert: https://crrev.com/c/1985990 should fix the root-cause now.

Original change's description:
> [regalloc] temporarily disable control-flow aware allocation
> 
> Bug: v8:10077
> 
> Change-Id: I4b76d62462658dfa54f351ba10e52e57f63f3493
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1977857
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#65536}

TBR=tebbi@chromium.org,thibaudm@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: v8:10077
Change-Id: I356f1cc8d70f1f9efdbc72e3398cc830c51b664d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1986002Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65608}