When accessing a field of a non-class type, Torque will generate a
CallAccess LocationReference, which has an unknown type. We still tried
to access it's type, resulting in a DCHECK failure.

Bug: v8:7793
Change-Id: I3650643e29db852783eca1e166b700eebd1b8dc2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2209056
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68180}