Support Post sart up script on runtime templates (#12929) (#902)

[upstream:0500297dde9a16e181d0e2228e06b835d72ad325]

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

Author: modular-magician

colab_runtime_template_full/main.tf

@@ -53,4 +53,17 @@ resource "google_colab_runtime_template" "runtime-template" {
   encryption_spec {
     kms_key_name = "my-crypto-key-${local.name_suffix}"
   }
+
+  software_config {
+    env {
+      name         = "TEST"
+      value   = 1
+    }
+
+    post_startup_script_config {
+      post_startup_script = "echo 'hello world'"
+      post_startup_script_url = "gs://colab-enterprise-pss-secure/secure_pss.sh"
+      post_startup_script_behavior = "RUN_ONCE"
+    }
+  }
 }