A late optimization step is only needed if Allocate operators get
expanded in MemoryOptimization, which is not the case for Webassembly.

Bug: v8:11510
Change-Id: I0e1af9922704d6a51f1257861ecc1e8a8faccc72
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2780295
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73606}