This avoids creating an on-heap copy for interpreter entry wrappers by
directly adding the {WasmCode} into the native heap instead. It reduces
compilation time as well as useless GC pressure.

R=clemensh@chromium.org
BUG=v8:8423

Change-Id: I91a8f3fc9fe542233d8700a58585f4715eed695a
Reviewed-on: https://chromium-review.googlesource.com/c/1337570Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57527}