This CL extends the lifetime of the typer in the pipeline until after
load elimination. This is a two-line CL to make it easy to revert if
we missed necessary brokerization.

If the CL sticks, we can remove some SetType calls in optimizations.

Change-Id: I4f27bfcada5221b2bae81297cd6b606881a7ccb8
Reviewed-on: https://chromium-review.googlesource.com/c/1341952
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57629}