Implement ARO Resource to Azure Terraform provider

[phbergsmann]

It would be great to have Terraform support for the creation of the cluster within the existing Terraform provider: https://registry.terraform.io/providers/hashicorp/azurerm/

The configuration parameters could be the same as with Bicep: https://docs.microsoft.com/en-us/azure/templates/microsoft.redhatopenshift/2020-04-30/openshiftclusters?tabs=bicep

[miroag]

+1

[romdalf]

+1 - we have common customers requesting this capabilities.

[salpalmer]

+1 - also need to be able to run the terraform with a Service Principle which does not required additional special administrator access than a standard SP has to Active Directory. We hit this requirement when trying to install ARO with azure cli and a service principle and was not allowed to elevate our service principle permissions.