[Test] In test test_cluster_in_no_internet_subnet add VPC endpoint for CloudWatch Metrics (com.amazonaws.$region.monitoring), which is now required by clustermgtd to put metrics.

Author: gmarciani

tests/integration-tests/network_template_builder.py

@@ -241,6 +241,12 @@ def __build_vpc_endpoints(self, subnet_id, route_table_ids):
                 type=VPCEndpointConfig.EndpointType.INTERFACE,
                 enable_private_dns=True,
             ),
+            VPCEndpointConfig(
+                name="MonitoringEndpoint",
+                service_name=f"com.amazonaws.{region}.monitoring",
+                type=VPCEndpointConfig.EndpointType.INTERFACE,
+                enable_private_dns=True,
+            ),
             VPCEndpointConfig(
                 name="CFNEndpoint",
                 service_name=prefix + f"com.amazonaws.{region}.cloudformation",