PG Review - Make zone required, Default to Private Endpoints

[terrymandin]

Description

Fixes #24

As part of the review of the Disk AVM with the PG, the following changes were requested:

Make "Zone" a required property
Set "network_access_policy" to "Allow Private"
Set "public_network_access" to false

Type of Change

• Non-module change (e.g. CI/CD, documentation, etc.)
• Azure Verified Module updates:
  • Bugfix containing backwards compatible bug fixes, and I have NOT bumped the MAJOR or MINOR version in locals.version.tf.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.
  • [x ] Feature update backwards compatible feature updates, and I have bumped the MINOR version in locals.version.tf.json.
  • [x ] Breaking changes and I have bumped the MAJOR version in locals.version.tf.json.
  • [x ] Update to documentation

Checklist

• [x ] I'm sure there are no other open Pull Requests for the same update/change
• [ x] My corresponding pipelines / checks run clean and green without any errors or warnings
• [x ] I did run all pre-commit checks

[microsoft-github-policy-service]

Important

The "Needs: Triage 🔍" label must be removed once the triage process is complete!

Note

This label was added as per ITA06.