Currently atomic operations are only allowed on shared WebAssembly.memory.
An attempt to use atomic operations otherwise is a validation failure, there
is an ongoing attempt to allow Wasm atomic operations on any memory object.

https://github.com/WebAssembly/threads/issues/144

This CL adds experimental support for allowing atomic operations on all
memory objects behind the --wasm-atomics-on-non-shared-memory flag. Note
that Wait/Notify may not work as expected as they have additional checks
to ensure that the memory is a SAB.

Bug: v8:9921
Change-Id: Ia65b1a4a96ec026430fcce028465423f600adacd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1895703
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64716}