flexible value for auth_method in pg_hba.conf if passwords are used

[SimonHoenscheid]

fixes #1465

[cruelsmith]

Fine in my 👀
Maybe we also should add a spec test for that one? Currently we not really checking the hba rules in spec that comes out of the server config class.

[SimonHoenscheid]

@cruelsmith I have problems getting this PR green, would you mind having a look?

[cruelsmith]

Ah found it ... the issue is that the postgresql::postgresql_password() still defaults to md5 and we manual need to set it to scram-sha-256 in case of version >= 14.
Question is if it is possible to respect the $postgresql::server::password_encryption in the postgresql::postgresql_password() in some way. Else every code that uses that function needs to be updated to hand over that value.

When you want to review see here since it changes also some code: cd20e36 and https://github.com/cruelsmith/puppetlabs-postgresql/actions/runs/6100912336 (Yes the SLES and RHEL are failing since i test in my clone ENV but the important Ubuntu 22.04 is working)