ObjectGetPrototypeOf and ReflectGetPrototypeOf are now Torque builtins (previously CPP) and the Proxy path is implemented completely in Torque while everything else calls into runtime (and is thus a bit slower than previously).

Perf improvement in micro-benchmark JSTests/Proxies
Before:
GetPrototypeOfWithoutTrap-Proxies(Score): 1876
GetPrototypeOfWithTrap-Proxies(Score): 857

After:
GetPrototypeOfWithoutTrap-Proxies(Score): 2810
GetPrototypeOfWithTrap-Proxies(Score): 3197

Bug: v8:6664
Change-Id: If60dda67d6e90c2d6f0ec743f6cb7c0fff54d607
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1658717
Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62256}