Fix: Remove non-existent cluster_policy_id output

The compute module's outputs.tf was referencing a
databricks_cluster_policy.uc_qs_policy resource that doesn't exist,
causing Terraform errors for all cluster modules (sandbox, dev, prod).

This commit removes the invalid cluster_policy_id output, keeping only
the valid cluster_id output that references the existing
databricks_cluster.example resource.

Fixes terraform errors:
- Error: Reference to undeclared resource
- A managed resource 'databricks_cluster_policy' 'uc_qs_policy' has not been declared

Author: louiscsq

uc-quickstart/utils/modules/compute/outputs.tf

@@ -2,9 +2,3 @@ output "cluster_id" {
   description = "ID of the created cluster"
   value       = databricks_cluster.example.id
 }
-
-output "cluster_policy_id" {
-  description = "ID of the created cluster policy"
-  value       = databricks_cluster_policy.uc_qs_policy.id
-}
-