This CL enables the --wasm-generic-wrapper flag by default.

Bug: v8:10982
Change-Id: Iada906ce49810806c500ee3ca26e09e847b69a27
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2539915
Commit-Queue: Vicky Kontoura <vkont@google.com>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71374}