sheriff: disable CrSettingsPeoplePageSyncControlsTest.All

Test is failing on the Mac10.13 Tests builder

See
https://ci.chromium.org/p/chromium/builders/ci/Mac10.13%20Tests%20%28dbg%29/16844
https://ci.chromium.org/p/chromium/builders/ci/Mac10.13%20Tests%20%28dbg%29/16843
https://ci.chromium.org/p/chromium/builders/ci/Mac10.13%20Tests%20%28dbg%29/16842

TBR=dbeam@chromium.org

Bug: 1043665
Change-Id: If938bea126e7607e9c74787bac567cac04658c0b
No-try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2010178Reviewed-by: Nina Satragno <nsatragno@chromium.org>
Commit-Queue: Nina Satragno <nsatragno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#733392}

chrome/test/data/webui/settings/cr_settings_browsertest.js

@@ -517,7 +517,8 @@ CrSettingsPeoplePageSyncControlsTest.prototype = {
   ]),
 };
 
-TEST_F('CrSettingsPeoplePageSyncControlsTest', 'All', function() {
+// TODO(crbug.com/1043665): disabling due to deterministic failures.
+TEST_F('CrSettingsPeoplePageSyncControlsTest', 'DISABLED_All', function() {
   mocha.run();
 });