Write different configuration file for specific Sidekiq shard

In order to support separate pgbouncer pools I want the helm charts to write different configuration files based on a given sidekiq shard So that I can limit the effects of pgbouncer saturation events

Summary

We opted to add another release as seen in #1682 (closed). This lets us create a set of deployments and configmap for the Sidekiq deployments requiring a different set of database configuration. This method does not modify charts.

See thread on discussion and considerations: #3424 (comment 2112052808).