Add ACR Extensions - Githubissues

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The current repository includes terraform modules for ACR but does not have integration tests for these modules.

This PR introduces integration tests for ACR modules and adds a helper function for collecting configuration information to the test harness.

Added ACRREgistryE to test-harness/terratest-extensions/modules/azure/acr.go for collecting registry information using azure SDK for go
Added module integration tests to infra/modules/providers/azure/container-registry/tests/

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