API keys: Add deprecation message of terraform using api keys (#872)

* add: deprecation message of terraform using api keys

* deleted files

* Update internal/resources/grafana/resource_api_key.go

Co-authored-by: Julien Duchesne <[email protected]>

---------

Co-authored-by: Julien Duchesne <[email protected]>

Author: eleijonmarck

docs/resources/api_key.md

@@ -25,6 +25,7 @@ func ResourceAPIKey() *schema.Resource {
 		Importer: &schema.ResourceImporter{
 			StateContext: schema.ImportStatePassthroughContext,
 		},
+		DeprecationMessage: "Use `grafana_cloud_stack_service_account` together with `grafana_cloud_stack_service_account_token` resources instead see https://grafana.com/docs/grafana/next/administration/api-keys/#migrate-api-keys-to-grafana-service-accounts-using-terraform",
 
 		Schema: map[string]*schema.Schema{
 			"cloud_org_slug": {

docs/resources/cloud_api_key.md

@@ -20,9 +20,10 @@ Manages Grafana API Keys.
 * [HTTP API](https://grafana.com/docs/grafana/latest/developers/http_api/auth/)
 `,
 
-		CreateContext: resourceAPIKeyCreate,
-		ReadContext:   resourceAPIKeyRead,
-		DeleteContext: resourceAPIKeyDelete,
+		CreateContext:      resourceAPIKeyCreate,
+		ReadContext:        resourceAPIKeyRead,
+		DeleteContext:      resourceAPIKeyDelete,
+		DeprecationMessage: "Use `grafana_service_account` together with `grafana_service_account_token` instead, see https://grafana.com/docs/grafana/next/administration/api-keys/#migrate-api-keys-to-grafana-service-accounts-using-terraform",
 
 		Schema: map[string]*schema.Schema{
 			"org_id": orgIDAttribute(),