fix: update next hop gateway URLs in compute routes to use full API path

Author: Gezi-lzq

google.tf

@@ -359,7 +359,7 @@ resource "google_compute_route" "route_ipv4_googleapi" {
   name             = "route-to-gapis-ipv4-${var.automq_byoc_env_id}"
   network          = data.google_compute_network.vpc.name
   dest_range       = "199.36.153.8/30"
-  next_hop_gateway = "global/gateways/default-internet-gateway"
+  next_hop_gateway = "https://www.googleapis.com/compute/v1/projects/${var.cloud_project_id}/global/gateways/default-internet-gateway"
 
   priority = 90
 }
@@ -369,7 +369,7 @@ resource "google_compute_route" "route_ipv4_googleapi_additional" {
   name             = "route-to-gapis-ipv4-additional-${var.automq_byoc_env_id}"
   network          = data.google_compute_network.vpc.name
   dest_range       = "34.126.0.0/18"
-  next_hop_gateway = "global/gateways/default-internet-gateway"
+  next_hop_gateway = "https://www.googleapis.com/compute/v1/projects/${var.cloud_project_id}/global/gateways/default-internet-gateway"
 
   priority = 90
 }