Add workers for sms and email sending

We want to have different workers for sending out email and sending out
sms. This will enable us to better rate limit ourselves when sending to
our providers. For example, we can make sure we only have capacity in
the email worker to send at our rate of 500rps to SES.

Note, we may in due time need to split the sms sender worker into two
different workers, one for each provider.

A separate PR will come after this to remove the unsplit
`notify-delivery-worker-sender`.

manifest.yml.j2

@@ -53,6 +53,8 @@
   'notify-delivery-worker-jobs': {},
   'notify-delivery-worker-research': {},
   'notify-delivery-worker-sender': {'disk_quota': '2G', 'memory': '3G'},
+  'notify-delivery-worker-email': {'disk_quota': '2G', 'memory': '3G'},
+  'notify-delivery-worker-sms': {'disk_quota': '2G', 'memory': '3G'},
   'notify-delivery-worker-periodic': {},
   'notify-delivery-worker-reporting': {
     'additional_env_vars': {

scripts/paas_app_wrapper.sh

@@ -24,6 +24,14 @@ case $NOTIFY_APP_NAME in
     exec scripts/run_multi_worker_app_paas.sh celery multi start 3 -c 10 -A run_celery.notify_celery --loglevel=INFO \
     -Q send-sms-tasks,send-email-tasks
     ;;
+  delivery-worker-sender-sms)
+    exec scripts/run_multi_worker_app_paas.sh celery multi start 3 -c 10 -A run_celery.notify_celery --loglevel=INFO \
+    -Q send-sms-tasks
+    ;;
+  delivery-worker-sender-email)
+    exec scripts/run_multi_worker_app_paas.sh celery multi start 3 -c 10 -A run_celery.notify_celery --loglevel=INFO \
+    -Q send-email-tasks
+    ;;
   delivery-worker-periodic)
     exec scripts/run_app_paas.sh celery -A run_celery.notify_celery worker --loglevel=INFO --concurrency=2 \
     -Q periodic-tasks 2> /dev/null