New resource: azurerm_container_registry_agent_pool

[favoretti]

New version of #14790

[katbyte]

Thanks @favoretti - overall looks good aside from one test failure which i think my inline comment should fix:

------- Stdout: -------
=== RUN   TestAccContainerRegistryAgentPool_complete
=== PAUSE TestAccContainerRegistryAgentPool_complete
=== CONT  TestAccContainerRegistryAgentPool_complete
    testcase.go:110: Step 1/2 error: Error running pre-apply refresh: exit status 1
        
        Error: Unsupported argument
        
          on terraform_plugin_test.tf line 29, in resource "azurerm_subnet" "test":
          29:   address_prefix       = "10.0.2.0/24"
        
        An argument named "address_prefix" is not expected here. Did you mean
        "address_prefixes"?
--- FAIL: TestAccContainerRegistryAgentPool_complete (3.05s)
FAIL

[github-actions]

This functionality has been released in v3.1.0 of the Terraform Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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