Enable testing against ACR

[adityapatwardhan]

PR Summary

Enable testing against ACR instance.
The ACR instance is in an internal subscription and connection is done via a service connection in AzDO.
The az token is used to set a secret in secret vault, which is used to register the repository.

PR Context

PR Checklist

• PR has a meaningful title
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• Summarized changes
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
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• Breaking changes
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  • Documentation needed
    • Issue filed:
• User-facing changes
  • Not Applicable
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  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
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  • Make sure you've added a new test if existing tests do not effectively test the code changed
• Tooling
  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
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[alerickson]

Line 33 in the tests should be "5.2.5-alpha001"

[alerickson]

Resolves #1512