servo: Merge #17734 - Run chaos_monkey_test on the non-gating builder (from edunham:nogate); r=jdm

re https://github.com/servo/servo/issues/10927, https://github.com/servo/saltfs/pull/360

the old salt pr became a salt pr + a servo pr due to the buildbot steps living over here now.

Source-Repo: https://github.com/servo/servo
Source-Revision: 8e14d936022b863061ffc42cccc86922be03951a

--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 1ac0eb59d5103e203594f68b719cc34e530bc4d3

servo/etc/ci/buildbot_steps.yml

@@ -63,6 +63,11 @@ linux-rel-intermittent:
   - ./mach build --release
   - ./etc/ci/check_intermittents.sh --log-raw intermittents.log
 
+linux-rel-nogate:
+  - ./mach clean-nightlies --keep 3 --force
+  - ./mach build --release
+  - python ./etc/ci/chaos_monkey_test.py
+
 mac-rel-intermittent:
   - ./mach clean-nightlies --keep 3 --force
   - ./mach build --release