Since PKU-based switching always switches the permissions for all wasm
code memory in the process, the method should not be on the
{NativeModule} or {WasmCodeAllocator}, but instead on the process-wide
{WasmCodeManager}.

R=jkummerow@chromium.org

Bug: v8:11974
Change-Id: I75a82e51401b2572977c134077e1669cf5077049
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3021382
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75694}