Provide the cloud_provider_url as an output on a stack

[johncblandii]

Feature Request

These instructions have a curl request:

curl -sH "Authorization: Bearer <Access Token from previous step>" "https://grafana.com/api/instances" | \
  jq '[.items[]|{stackName: .slug, clusterName:.clusterSlug, cloudProviderAPIURL: "https://cloud-provider-api-\(.clusterSlug).grafana.net"}]'

This returns something like https://cloud-provider-api-prod-us-central-0.grafana.net. This url is not provided dynamically so we have to hardcode the URL.

If this URL is specific to the stack, can we get it provided as an output to grafana_cloud_stack?

Might as well make sure all of these are returned:

[
  {
    "stackName": "herokublogpost",
    "clusterName": "prod-us-central-0",
    "cloudProviderAPIURL": "https://cloud-provider-api-prod-us-central-0.grafana.net"
  }
]