patroni support use of tls certificates
The patroni restapi config has options for providing certs and using tls for communication: https://patroni.readthedocs.io/en/latest/SETTINGS.html#rest-api
We should add support to allowing users to provide these certs, and document their optional use. (Similar documentation for praefect can be found here: https://docs.gitlab.com/ee/administration/gitaly/praefect.html#enabling-tls-support and can be used as an example of how we expect this to be configured for omnibus GitLab)