feat(compute): add preview disable feature (#907)

* Create main.tf

This pull request creates a method to disallow users from using the alpha API for Compute Engine.

* Update main.tf

Fixed the region tag.

* update activation status

---------

Co-authored-by: Katie McLaughlin <[email protected]>

Author: davide-zanon

compute/preview_feature/disable/main.tf

@@ -0,0 +1,29 @@
+/**
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+# [START compute_preview_feature_disable]
+
+resource "google_compute_preview_feature" "default" {
+  name              = "alpha-api-access"
+  activation_status = "ACTIVATION_STATE_UNSPECIFIED"
+  rollout_operation {
+    rollout_input {
+      predefined_rollout_plan = "ROLLOUT_PLAN_FAST_ROLLOUT"
+    }
+  }
+}
+
+# [END compute_preview_feature_disable]