Improve `output identity_ids`

Is there an existing issue for this?

[X] I have searched the existing issues

Description

Now we have:

output "identity_ids" {
  description = "The identities of the Container App."
  value       = { for name, container in azurerm_container_app.container_app : name => container.identity }
}

Actually we've exported the whole container identity block, not just id. We should change the output's map value to a wrapped object type instead of export container.identity directly to avoid extra coupling between the provider's schema and the user's code.

New or Affected Resource(s)/Data Source(s)

output "identity_ids"

Potential Terraform Configuration

No response

References