[CI] Rename premerge_resources modules

This patch renames the premerge_resources modules to be more consistent with
the rest of the naming using the name of the cluster with a suffix of the
cluster region.

Author: boomanaiden154

premerge/main.tf

@@ -128,7 +128,7 @@ provider "kubernetes" {
   alias                  = "llvm-premerge-us-west"
 }
 
-module "premerge_cluster_resources" {
+module "premerge_cluster_resources_us_central" {
   source                     = "./premerge_resources"
   github_app_id              = data.google_secret_manager_secret_version.github_app_id.secret_data
   github_app_installation_id = data.google_secret_manager_secret_version.github_app_installation_id.secret_data
@@ -141,7 +141,13 @@ module "premerge_cluster_resources" {
   }
 }
 
-module "premerge_cluster_resources2" {
+# TODO(boomanaiden154): Remove this after moving.
+moved {
+  from = module.premerge_cluster_resources
+  to   = module.premerge_cluster_resources_us_central
+}
+
+module "premerge_cluster_resources_us_west" {
   source                     = "./premerge_resources"
   github_app_id              = data.google_secret_manager_secret_version.github_app_id.secret_data
   github_app_installation_id = data.google_secret_manager_secret_version.github_app_installation_id.secret_data
@@ -154,6 +160,12 @@ module "premerge_cluster_resources2" {
   }
 }
 
+# TODO(boomanaiden154): Remove this after moving.
+moved {
+  from = module.premerge_cluster_resources2
+  to   = module.premerge_cluster_resources_us_west
+}
+
 data "google_secret_manager_secret_version" "metrics_github_pat" {
   secret = "llvm-premerge-metrics-github-pat"
 }