CI: Increase aio volume size to 50GB in upgrade jobs

New images seem to be running out of space.

Author: markgoddard

.github/workflows/stackhpc-all-in-one.yml

@@ -167,7 +167,7 @@ jobs:
           VM_NETWORK: ${{ inputs.vm_network }}
           VM_SUBNET: ${{ inputs.vm_subnet }}
           VM_INTERFACE: ${{ inputs.vm_interface }}
-          VM_VOLUME_SIZE: ${{ inputs.upgrade && '45' || '35' }}
+          VM_VOLUME_SIZE: ${{ inputs.upgrade && '50' || '35' }}
           VM_TAGS: '["skc-ci-aio", "PR=${{ github.event.number }}"]'
 
       - name: Terraform Plan