Add repeat_record_datasource_queue to staging

[gherceg]

https://dimagi.atlassian.net/browse/SAAS-15906

Goes with this HQ PR: dimagi/commcare-hq#35022

Adding a new queue to process a specific type of repeater. This is only meant as a temporary solution to give solutions time to improve CCA, and give SaaS time to improve repeat record infrastructure.

Environments Affected

Staging

[gherceg]

Tested on staging by running the following:

# create new workers for new queue
cchq --control staging update-supervisor-confs --limit celery --branch gh/repeaters/datasource-queue 

# update django settings
cchq --control staging update-config --branch gh/repeaters/datasource-queue

# restart commcare services to ensure updated settings are used when sending tasks to rabbit (could be accomplished via deploy)
cchq --control staging service commcare restart

Things look good on staging.