Bug 1555454 - migrate jsreftests to macosx1014 r=gbrown

Changes:
- migrate jsreftest over to macosx1014
- re-balance the chunks for non-ccov variants of macosx1014

Differential Revision: https://phabricator.services.mozilla.com/D34771

--HG--
extra : moz-landing-system : lando

taskcluster/ci/test/reftest.yml

@@ -86,7 +86,8 @@ jsreftest:
             linux64-qr/opt: 4
             linux64-qr/debug: 5
             linux64/debug: 5
-            macosx.*64-ccov/debug: 5
+            macosx.*-64-ccov/debug: 5
+            macosx.*-64(-shippable)?/.*: 2
             default: 3
     max-run-time:
         by-test-platform:

taskcluster/ci/test/test-sets.yml

@@ -314,7 +314,7 @@ macosx1014-64-tests:
     - firefox-ui-functional-remote
     # - gtest
     - jittest
-    # - jsreftest
+    - jsreftest
     - marionette
     # - mochitest
     - mochitest-a11y
@@ -344,7 +344,6 @@ macosx1014-64-qr-tests:
 
 macosx64-tests:
     - gtest
-    - jsreftest
     - mochitest
     - mochitest-browser-chrome
     - mochitest-chrome