[turbofan] escape analysis: remove TypeGuard renamings of dematerialized allocations from the effect chain

Change-Id: Ie7b43feda381647523cb8cc3e7965823d3006063
Reviewed-on: https://chromium-review.googlesource.com/1188140Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55386}