Update OWNERS for wasm WPT tests

Add myself and ahaas@ (who handles importing Wasm spec tests in V8).
Remove ex-owner binji@.

Change-Id: Id810d2e45be612fbb633a4d6a44e0403a000a8b6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5424824


Auto-Submit: Adam Klein <adamk@chromium.org>
Reviewed-by: Philip Jägenstedt <foolip@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Philip Jägenstedt <foolip@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1283066}