LocalAllocator was already renamed to EvacuationAllocator some time ago.
Rename files now as well.

Bug: v8:10315
Change-Id: I337f693998aaf5187a5ba05842cdb2474837b68d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3463719
Auto-Submit: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79104}