Bug 1439588 - run xperf in os administrator group. r=pmoore

run xperf in os groups=administrators and support os_groups in taskcluster

Differential Revision: https://phabricator.services.mozilla.com/D4001

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

taskcluster/ci/test/talos.yml

@@ -602,6 +602,7 @@ talos-xperf:
     try-name: xperf
     treeherder-symbol: T(x)
     virtualization: virtual
+    os-groups: ['Administrators']
     run-on-projects:
         by-test-platform:
             windows7-32-msvc/.*: ['mozilla-beta', 'mozilla-central', 'try']

taskcluster/taskgraph/transforms/job/mozharness_test.py

@@ -206,7 +206,10 @@ def mozharness_test_on_generic_worker(config, job, taskdesc):
     installer_url = get_artifact_url(upstream_task, mozharness['build-artifact-name'])
 
     taskdesc['scopes'].extend(
-        ['generic-worker:os-group:{}'.format(group) for group in test['os-groups']])
+        ['generic-worker:os-group:{}/{}'.format(
+            job['worker-type'],
+            group
+        ) for group in test['os-groups']])
 
     worker['os-groups'] = test['os-groups']