Add OWNERS for src/torque

Bug: v8:9247
Change-Id: I4d2a1f6442b5c187a462f855e4655d9429021d22
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1612908Reviewed-by: Daniel Clifford <danno@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61525}

src/torque/OWNERS

+danno@chromium.org
+jarin@chromium.org
+mvstanton@chromium.org
+sigurds@chromium.org
+szuend@chromium.org
+tebbi@chromium.org