Embedders should use WasmModuleObject instead.

R=adamk@chromium.org

Change-Id: Ibe5e4b160bb917bcd9f895be1b954acc40a045d8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1513616Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60184}