This CL adds a prototype_chain_enum_cache to cache the enumeration of a
prototype and its entire chain on the PrototypeInfo. It can improve for-in
performance via simply merging the receiver enumeration with this cache.

It improves the score of JetStream2-tagcloud-SP case by ~9% on IA Chromebook.

Contributed by tao.pan@intel.com

Change-Id: Ib40bfe41e772672337155584672f06fa1ba1e70d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1870844
Commit-Queue: Shiyu Zhang <shiyu.zhang@intel.com>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65224}