[Sheriff] Disable SystemHealthBenchmarkSmokeTest

Test is flaky for search/india and social. See bug.

TBR=sullivan@chromium.org

Bug: 1014661
Change-Id: I2c098f543ed2f6acd2575e821a21328e474735c9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1863379Reviewed-by: Parastoo Geranmayeh <parastoog@google.com>
Commit-Queue: Parastoo Geranmayeh <parastoog@google.com>
Cr-Commit-Position: refs/heads/master@{#706403}

tools/perf/benchmarks/system_health_smoke_test.py

@@ -170,6 +170,10 @@ _DISABLED_TESTS = frozenset({
   'system_health.memory_desktop/browse:tools:sheets:2019',
   'system_health.memory_desktop/browse:tools:maps:2019',
 
+  # crbug.com/1014661
+  'system_health.memory_desktop/browse:social:tumblr_infinite_scroll:2018'
+  'system_health.memory_desktop/browse:search:google_india:2018'
+
   # The following tests are disabled because they are disabled on the perf
   # waterfall (using tools/perf/expectations.config) on one platform or another.
   # They may run fine on the CQ, but it isn't worth the bot time to run them.