Update launch stage for GPU on WorkerPools from ALPHA to BETA (#15058) (#1106)

[upstream:5a0cf38c5279b2ca96d7473918cd4ab23beaa79c]

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

cloudrunv2_worker_pool_gpu/main.tf

@@ -2,7 +2,7 @@ resource "google_cloud_run_v2_worker_pool" "default" {
   name     = "cloudrun-worker-pool-${local.name_suffix}"
   location = "us-central1"
   deletion_protection = false
-  launch_stage = "ALPHA"
+  launch_stage = "BETA"
 
   template {
     containers {