Support private endpoint creation in Azure

Story: As an image registry developer, I want to be able to programmatically create a private endpoint in Azure without having to worry about explicitly creating the supporting objects, so that I can easily enable support for private storage accounts in Azure.

ACCEPTANCE CRITERIA

When the registry is in private mode:

• Private endpoint is created in Azure
• Private DNS zone is created in Azure
• Record Set (type A) is created in Azure
• Private DNS Zone Group is created in Azure
• Virtual Network Link is created between Private Endpoint and VNet
• Configuring the registry to use a private endpoint, then setting it to "Removed" should delete the private endpoint from Azure.

DOCUMENTATION

• No documentation is needed at this point