Traces calls to Heap::IsAllocationPending that return true. This is
useful when debugging concurrent Turbofan.

Bug: v8:7790
Change-Id: If10e6f40c3bf03c768ad8b74403007fe86f860fe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3060488Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#76012}