fix WASM Plugins test config and skip tests (#15245)

Author: shuyama1

mmv1/products/networkservices/WasmPlugin.yaml

@@ -47,14 +47,14 @@ examples:
       wasm_plugin_name: 'my-wasm-plugin'
       plugin_package_name: 'my-wasm-plugin-data'
       repository_name: 'my-artifact-registry-docker-repository'
-    skip_vcr: true
+    skip_test: https://github.com/GoogleCloudPlatform/magic-modules/pull/12275#discussion_r2283175770
   - name: 'wasm_plugin_basic_generic_repository'
     primary_resource_id: 'wasm_plugin'
     vars:
       wasm_plugin_name: 'my-wasm-plugin'
       plugin_package_name: 'my-wasm-plugin-data'
       repository_name: 'my-artifact-registry-generic-repository'
-    skip_vcr: true
+    skip_test: https://github.com/GoogleCloudPlatform/magic-modules/pull/12275#discussion_r2283175770
 parameters:
   - name: 'location'
     type: String

mmv1/templates/terraform/examples/wasm_plugin_basic_docker_repository.tf.tmpl

@@ -18,7 +18,7 @@ resource "google_network_services_wasm_plugin" "{{$.PrimaryResourceId}}" {
   versions {
     version_name = "v1"
     description = "v1 version of my wasm plugin"
-    image_uri = "us-central1-docker.pkg.dev/${data.google_project.project.name}/{index $.Vars "repository_name"}/{index $.Vars "plugin_package_name"}:prod"
+    image_uri = "us-central1-docker.pkg.dev/${data.google_project.project.name}/{{index $.Vars "repository_name"}}/{{index $.Vars "plugin_package_name"}}:prod"
 
     labels = {
       test_label =  "test_value"

mmv1/templates/terraform/examples/wasm_plugin_basic_generic_repository.tf.tmpl

@@ -18,7 +18,7 @@ resource "google_network_services_wasm_plugin" "{{$.PrimaryResourceId}}" {
   versions {
     version_name = "v1"
     description = "v1 version of my wasm plugin"
-    image_uri = "projects/${data.google_project.project.name}/locations/us-central1/repositories/{index $.Vars "repository_name"}/genericArtifacts/{index $.Vars "plugin_package_name"}:v1"
+    image_uri = "projects/${data.google_project.project.name}/locations/us-central1/repositories/{{index $.Vars "repository_name"}}/genericArtifacts/{{index $.Vars "plugin_package_name"}}:v1"
 
     labels = {
       test_label =  "test_value"