Replace rmcilroy with syg as interpreter/OWNER

Change-Id: Ie96be7e4d1c37de92cbb6271fb0c8779ea9d4ae4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3106746Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76395}

src/interpreter/OWNERS

 leszeks@chromium.org
 mythria@chromium.org
-rmcilroy@chromium.org
+syg@chromium.org