[Sheriff] Disable runtime API test that is flaky in various builders

Consistently failing on Mac. Flake portal also shows it failing in
multiple builders.

Bug: 1446468
Change-Id: I5c6bc88d39c5c77cb074f41b9f0bf1f2b1222954
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4546159


Owners-Override: Emilia Paz <emiliapaz@chromium.org>
Commit-Queue: Emilia Paz <emiliapaz@chromium.org>
Reviewed-by: Tim <tjudkins@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1145705}