support database creation from hiera parameters

[jst-cyr]

This PR is created to execute tests for the original PR (#1661)

[jst-cyr]

This requires #1691 to allow tests to run

[jst-cyr]

All failures in the test run match existing failures in the nightly build against main. None appear to be introduced by this PR.

Platform	This PR	Nightly (main)	Failing step	Notes
Scientific-7	❌	❌	Run acceptance tests	postgresql::server with defaults — service fails to start (Failed to get D-Bus connection: Operation not permitted)
OracleLinux-7	❌	❌	Run acceptance tests	Same D-Bus/systemd service-start failure
CentOS-7	❌	❌	Run acceptance tests	Same D-Bus/systemd service-start failure
Debian-13	❌	❌	Run acceptance tests	postgresql::server::default_privileges — idempotency failure (ALTER DEFAULT PRIVILEGES... re-applies on second run)
SLES-12	❌	❌	Provision environment	LitmusTimeoutError during environment provisioning

All other platforms are green.

Compared:

• PR run: https://github.com/puppetlabs/puppetlabs-postgresql/actions/runs/32032023426
• Nightly run: https://github.com/puppetlabs/puppetlabs-postgresql/actions/runs/32032298372

Since these are pre-existing issues on main, they shouldn't block this PR.

Feedback to be provided on original PR.