feat: Updated DB-For-Postgre-SQL-Flexible Server CMK implementation

[AlexanderSehr]

Description

• Updated DB-For-Postgre-SQL-Flexible Server CMK implementation
• Implemented AVM-Common-Types

Linked to

• Update CMK implementations as per https://github.com/Azure/bicep-registry-modules/issues/2842#issuecomment-2423679879
• Docs Update: https://github.com/Azure/Azure-Verified-Modules/pull/1683
• UDT update: https://github.com/Azure/bicep-registry-modules/pull/3724

Pipeline Reference

Pipeline

Type of Change

• [ ] Update to CI Environment or utilities (Non-module affecting changes)
• [x] Azure Verified Module updates:
  • [ ] Bugfix containing backwards-compatible bug fixes, and I have NOT bumped the MAJOR or MINOR version in version.json:
  • [ ] Someone has opened a bug report issue, and I have included "Closes #{bug_report_issue_number}" in the PR description.
  • [ ] The bug was found by the module author, and no one has opened an issue to report it yet.
  • [ ] Feature update backwards compatible feature updates, and I have bumped the MINOR version in version.json.
  • [ ] Breaking changes and I have bumped the MAJOR version in version.json.
  • [ ] Update to documentation