Add an event for recording metrics related to instantiating Wasm modules.

R=clemensb@chromium.org

Bug: chromium:1092417
Change-Id: I5c87aba7d2cdb012951249b336684580595844cd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2351675
Commit-Queue: Emanuel Ziegler <ecmziegler@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69472}