Move disablling upgrades in shared file

Author: harshthakkar01

examples/machine-learning/build-service-images/a3m/blueprint.yaml

@@ -315,13 +315,4 @@ deployment_groups:
       # patching their systems against vulnerabilities.
       #
       # To enable unattended upgrades, please remove this section.
-      metadata:
-        user-data: |
-          #cloud-config
-          write_files:
-          - path: /etc/apt/apt.conf.d/20auto-upgrades
-            permissions: '0644'
-            owner: root
-            content: |
-              APT::Periodic::Update-Package-Lists "0";
-              APT::Periodic::Unattended-Upgrade "0";
+      metadata: $(vars.packer_metadata)

examples/machine-learning/build-service-images/common/blueprint.yaml

@@ -207,13 +207,4 @@ deployment_groups:
       # patching their systems against vulnerabilities.
       #
       # To enable unattended upgrades, please remove this section.
-      metadata:
-        user-data: |
-          #cloud-config
-          write_files:
-          - path: /etc/apt/apt.conf.d/20auto-upgrades
-            permissions: '0644'
-            owner: root
-            content: |
-              APT::Periodic::Update-Package-Lists "0";
-              APT::Periodic::Unattended-Upgrade "0";
+      metadata: $(vars.packer_metadata)

examples/machine-learning/build-service-images/shared.yaml

@@ -22,6 +22,16 @@ vars:
   family:
   project_id:
   deployment_name:
+  packer_metadata:
+    user-data: |
+      #cloud-config
+      write_files:
+      - path: /etc/apt/apt.conf.d/20auto-upgrades
+        permissions: '0644'
+        owner: root
+        content: |
+          APT::Periodic::Update-Package-Lists "0";
+          APT::Periodic::Unattended-Upgrade "0";
 
   runner_install_slurm:
     type: shell