This is a reland of commit e1f585ed

ExternalPointerTable issues have been fixed in
https://crrev.com/c/3849650 and https://crrev.com/c/3849376

Original change's description:
> [sandbox] Sandboxify EmbedderDataSlots
>
> Bug: v8:10391
> Change-Id: If85a308a6f6ed1b17d86f87b4911c82d2327ea72
> Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3757341
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Commit-Queue: Samuel Groß <saelo@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82623}

Bug: v8:10391
Change-Id: If77f6c10e81c30c2dfa6b33c788bc4a36e4da135
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3852602
Commit-Queue: Samuel Groß <saelo@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82686}