Enable SSL by default

[davidassigbi]

Description

This update enables SSL by default within the Ansible role, including automatic generation of self-signed certificates. Additionally, it changes the default value of the postgresql_config_change_allow_restart variable to false, preventing automatic restarts on configuration changes by default.

closes #6

Motivation and Context

These changes improve the default security posture of PostgreSQL by enabling SSL out of the box. They also help avoid unnecessary restarts during configuration updates unless explicitly allowed, aligning better with production deployment expectations.

How Has This Been Tested?

Tests performed with Molecule both locally and using Github Actions

Screenshots (if appropriate):

Types of Changes

• Breaking change: feat(ssl): Enable SSL by default with support for generating self signed certificates
• Breaking change: feat(config): Change default value of postgresql_config_change_allow_restart to false
• chore(ci): Switch ansible lint action to ansible/ansible-lint@main

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.