Bug 1522111 - Followup, ensure test sets align between opt and pgo. r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D19968

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

taskcluster/ci/test/test-platforms.yml

@@ -80,7 +80,12 @@ linux64-pgo/opt:
     test-sets:
         - common-tests
         - web-platform-tests
+        - opt-only-tests
+        - desktop-screenshot-capture
         - talos
+        - awsy
+        - mochitest-headless
+        - linux-talos-flex
         - raptor-firefox
         - raptor-fetch-firefox
 
@@ -237,11 +242,11 @@ windows10-64-pgo/opt:
     test-sets:
         - awsy
         - desktop-screenshot-capture
-        - marionette-gpu-tests
         - windows-talos
         - marionette-gpu-tests
         - windows-tests
         - web-platform-tests
+        - mochitest-headless
         - raptor-firefox
 
 windows10-64-nightly/opt: