Guard for extremely large and small values passed to
Isolate::AdjustAmountOfExternalAllocatedMemory from the embedder.

Bug: chromium:1147372
Change-Id: Ib1470bdf2dd16cbc6e61dd1bca97fa5a66f04c77
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2543925
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71241}