During date parsing, a FixedArray is allocated to store intermediate values,
which is slow. This CL holds the values on stack instead to save time.

This increases the score of JetStream2 Date-format-tofte-SP case by ~2%
on WhiskeyLake Chromebook.

Contributed by hao.a.xu@intel.com

Change-Id: I0d7a20a3ad9c57e3a225fff03efc2e434b20fbbc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1726744
Commit-Queue: Shiyu Zhang <shiyu.zhang@intel.com>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63039}