[task scheduler] Move staging instance to Firestore

Add some missing auth scopes.

Bug: skia:
Change-Id: I21b302572adbe5649bf06bfe8f2cabf3ce062ed0
Reviewed-on: https://skia-review.googlesource.com/c/177180
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
diff --git a/status/sys/status-staging.service b/status/sys/status-staging.service
index de99346..61077ee 100644
--- a/status/sys/status-staging.service
+++ b/status/sys/status-staging.service
@@ -12,6 +12,7 @@
     --host=status-staging.skia.org \
     --resources_dir=/usr/local/share/status \
     --capacity_recalculate_interval=30m \
+    --firestore_instance=staging \
     --pubsub_topic_tasks=task-scheduler-modified-tasks-staging \
     --pubsub_topic_jobs=task-scheduler-modified-jobs-staging \
     --repo=https://skia.googlesource.com/skiabot-test.git \
diff --git a/task_scheduler/sys/task-scheduler-staging.service b/task_scheduler/sys/task-scheduler-staging.service
index 8ea6c3e..51e7b30 100644
--- a/task_scheduler/sys/task-scheduler-staging.service
+++ b/task_scheduler/sys/task-scheduler-staging.service
@@ -8,6 +8,7 @@
 ExecStart=/usr/local/bin/task_scheduler \
     --gsBucket=skia-task-scheduler-staging \
     --host=task-scheduler-staging.skia.org \
+    --firestore_instance=staging \
     --isolate_server=https://isolateserver-dev.appspot.com \
     --logtostderr \
     --pool=Skia \