This adds a test, and a toggle disable_resource_suballocation.
This enables testing the behavior discovered in the bug without
creating enormous resources.
Bug: chromium:1313172
Change-Id: I779aad50c051e5022a9c85ebfbf33c18173a748f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/85861
Reviewed-by: Loko Kung <lokokung@google.com>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>