[Sheriff] Disable 3 devtools tests on linux

No-try: true
Bug: 1179263
Change-Id: I4d50fbb0c15b3a33807198082e1f9e685f31bad6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2699129
Commit-Queue: Ella Ge <eirage@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#854823}