This CL is mostly mechanic and provides runtime and static
dispatch for allocation of objects using HeapAllocator.

Future CLs will remove the Heap bottelenecks.

Bug: v8:12615
Change-Id: Id2becf7da4bd5273f96abc0e1a4ac6c04bddb1cb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3474674Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79229}