[Modules] Update Microsoft.DBforPostgreSQL API to '2022-12-01' and add support for data encryption using CMK

[ahmadabdalla]

Closes #2532

Description

• Updated API to 2022-12-01.
• Added support for the CMK properties, which allows encrypting the Database using CMK via Azure Key Vault. This resulted in additional parameters and enabling User Identity for the Flexible Server. Note that System Identity is not supported. This implementation aligns to other modules and used Batch, Service Bus Namespace and Storage Account as reference.
• Improved documentation

Pipeline references

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Pipeline

Type of Change

• New feature (non-breaking change which adds functionality)

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]

Test Results

    1 files      1 suites   1m 6s ⏱️
164 tests 160 ✔️ 4 💤 0 ❌
181 runs  175 ✔️ 6 💤 0 ❌

Results for commit 23c4ffe.

♻️ This comment has been updated with latest results.