ScopeInfo will contain either inlined (array) local names or
a hash table (names => index) containing the local names.

If we have the local names inlined, we should save the class
variable context slot index.

If we have a hash table instead, we should save the class
variable offset in the internal hash table storage.

Bug: v8:12315
Change-Id: Ifd9ae4f285d11fc034e8560c8558038b38a474fb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3386599Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78621}