Argc and Slot are usually small and fit within a single 32bit word.
This reduces most property calls by 5 bytes.

This results in roughly 1% code reduction for sparkplug and no
measurable regression on x64.

Bug: v8:11420
Change-Id: I272c26c40b99f2dc5817f18bec113662a5bfebce
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2872828Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74505}