Add ACR Publish tests

[alerickson]

PR Summary

Adding test suite for Publish-PSResource from ACR server.

Also resolves #1559

PR Context

PR Checklist

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• [ ] Summarized changes
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• Breaking changes
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  • [ ] [Documentation needed]()
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• User-facing changes
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  • [ ] [Documentation needed]()
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• 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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