There is only one global wasm engine, so we do not need to store the
pointer in the NativeModule. We just use {GetWasmEngine()} instead,
which reads the global pointer.

R=jkummerow@chromium.org

Bug: v8:11879
Change-Id: I66dedd571755774d96621b8d20ff23bdfef8134f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2983208Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75366}