V8 has a handle scope below each `GetSharedArrayBufferId()` call,
so using a `v8::Local` that outlives that handle scope to store
references to `SharedArrayBuffer`s is invalid and may cause accidental
de-duplication of passed `SharedArrayBuffer`s.
Use a persistent handle instead to address this issue.
Fixes: https://github.com/nodejs/node/issues/28559
PR-URL: https://github.com/nodejs/node/pull/28582
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
