[Modules] Configure privateDnsZoneGroups on app config

[eriqua]

Description

Closes #1688

Note: Does not solve the issue of the private endpoint on configuration store not being idempotent.

• Adding private DNS zone group id to associate the private endpoint with a private DNS zone.

Pipeline references

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Pipeline

Type of Change

Please delete options that are not relevant.

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Update to documentation

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• My corresponding pipelines / checks run clean and green without any errors or warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (readme)
• I did format my code

[github-actions]

Unit Test Results

  1 files  ±0    1 suites  ±0   21s ⏱️ -1s
79 tests ±0  78 ✔️ ±0  1 💤 ±0  0 ❌ ±0 
80 runs  ±0  79 ✔️ ±0  1 💤 ±0  0 ❌ ±0 

Results for commit e423763. ± Comparison against base commit f153f33.