provider/google: better visibility for compute_region_backend_service (#14301)

builtin/providers/google/resource_compute_backend_service.go

@@ -121,7 +121,7 @@ func resourceComputeBackendService() *schema.Resource {
 				Type:     schema.TypeString,
 				Optional: true,
 				ForceNew: true,
-				Removed:  "region has been removed as it was never used",
+				Removed:  "region has been removed as it was never used. For internal load balancing, use google_compute_region_backend_service",
 			},
 
 			"self_link": &schema.Schema{

website/source/docs/providers/google/r/compute_backend_service.html.markdown

@@ -10,6 +10,8 @@ description: |-
 
 A Backend Service defines a group of virtual machines that will serve traffic for load balancing.
 
+For internal load balancing, use a [google_compute_region_backend_service](/docs/providers/google/r/compute_region_backend_service.html).
+
 ## Example Usage
 
 ```hcl