Revert "[sandbox] Sandboxify Foreign external pointer"

This reverts commit 543b54da.

Reason for revert: Causes crashes on Android due to TBI: https://crbug.com/chromium/1344581

Original change's description:
> [sandbox] Sandboxify Foreign external pointer
>
> Bug: v8:10391
> Change-Id: I4c5c209454db316fe86f379f6b2e6dfc7ba7754e
> 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/+/3757340
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Commit-Queue: Samuel Groß <saelo@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#81703}

Bug: v8:10391
Change-Id: I88899def209c592cd353dd4ed81003f1bbb7a760
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3764440
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Samuel Groß <saelo@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81731}

include/v8-internal.h

@@ -310,7 +310,7 @@ constexpr uint64_t kExternalPointerTagShift = 48;
 // These tags must have 8 zeros and 8 ones, see comment above.
 // New entries should be added with state "sandboxed".
 #define EXTERNAL_POINTER_TAGS(V)                                      \
-  V(kForeignForeignAddressTag,       sandboxed,   0b1000000001111111) \
+  V(kForeignForeignAddressTag,       unsandboxed, 0b1000000001111111) \
   V(kNativeContextMicrotaskQueueTag, unsandboxed, 0b1000000010111111) \
   V(kEmbedderDataSlotPayloadTag,     unsandboxed, 0b1000000011011111) \
   V(kCodeEntryPointTag,              unsandboxed, 0b1000000011110111) \