Rename files to match contents (src/objects/compilation-cache-table*),
and extract implementations from objects.cc into dedicated .cc file.

Bug: v8:8888
Change-Id: I02915316ee62186f94373b1859c7d8119a1953f1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2516473
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70944}