Since kTaggedSize got shrinked and we are actually compressing
the pointers (as oppposed to zeroing their upper bits),
we need to update the arm64 codebase to accommodate this change.

Cq-Include-Trybots: luci.v8.try:v8_linux64_arm64_pointer_compression_rel_ng
Bug: v8:7703
Change-Id: I890f3ab8c046f47232e80f85830f9ae8f4dbced4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1499498
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60172}