Main changes:
  ContextData class to hold a map of slots to ObjectData for known
    necessary lookups.
  LdaGlobal* and StaGlobal now receive an accumulator hint of the
    constant found at the lookup slot for immutable global context
    operations.

Bug: v8:7790
Change-Id: I63dc9eb8ebbbdfa4ce3b71c6aba63b3c06a3da9b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1532074Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60386}