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 [AVM Module Issue]: Support autorotation for customer managed key in storage account #2842 (comment)
• Docs Update: feat: Added CMK schema & introduced type import Azure-Verified-Modules#1683
• UDT update: feat: Added additional variant of CMK UDT for resources supporting auto-rotation #3724

Pipeline Reference

Pipeline

Type of Change

• Update to CI Environment or utilities (Non-module affecting changes)
• 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