This limit is wasm-internal, and does not need to be exposed via
src/common/globals.h.
This CL moves it into the {WasmCodeAllocator}.

Drive-by: Minor simplification in jump table stress test.

R=ecmziegler@chromium.org

Change-Id: Iff8c4657697ae98123d840a022c5b21c4948fcdf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2375189Reviewed-by: Emanuel Ziegler <ecmziegler@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69558}