Notify release management when push-apk fails

taskcluster/ci/push-apk/kind.yml

@@ -46,3 +46,8 @@ job-template:
     treeherder:
         job-symbol: gp
         kind: build
+    routes:
+        by-level:
+            '3':
+              - "notify.email.release-mgmt@mozilla.com.on-failed"
+            'default': []

taskcluster/fenix_taskgraph/transforms/push_apk.py

@@ -16,7 +16,7 @@ transforms = TransformSequence()
 @transforms.add
 def resolve_keys(config, tasks):
     for task in tasks:
-        for key in ("worker.channel", "worker.dep", "worker.certificate-alias"):
+        for key in ("worker.channel", "worker.dep", "worker.certificate-alias", "routes"):
             resolve_keyed_by(
                 task,
                 key,