This reverts commit d471ec9f.

Reason for revert: Unexpected redness on non-ptr-compr bots.

Original change's description:
> [ptr-compr][x64] Temporarily enable pointer compression on x64
>
> Bug: v8:7703
> Change-Id: Id7858d2d7324670d01836f7acbb952cd99c4a8b7
> Cq-Include-Trybots: luci.v8.try:v8_linux64_ubsan_rel_ng,v8_linux64_tsan_rel
> Cq-Include-Trybots: luci.v8.try:v8_linux64_cfi_rel_ng
> Cq-Include-Trybots: luci.chromium.try:fuchsia_x64,linux-rel,mac-rel
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1849522
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64248}

Tbr: verwaest@chromium.org,machenbach@chromium.org
No-Tree-Checks: true
Bug: v8:7703
Change-Id: I841d9722642f75f1277aedd70c4476aee041d946
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1857218Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64251}