This CL adds:
a) Helper macros that access the meta table, used in follow-up CLs

b) Infrastructure for building efficient accesses to the meta table

Bug: v8:11330
Change-Id: I5494c3048a4f82f21871437dfe367d6a456c8257
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2773004
Commit-Queue: Frank Emrich <emrich@google.com>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73602}