TaggedSigned to CompressedPointer, and TaggedPointer to CompressedSigned.

Cq-Include-Trybots: luci.v8.try:v8_linux64_pointer_compression_rel_ng
Cq-Include-Trybots: luci.v8.try:v8_linux64_arm64_pointer_compression_rel_ng
Bug: v8:7703
Change-Id: I9a257e583527256230576c7bc3d4c4b308570d2f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1585729
Auto-Submit: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61046}