Ensure installer image is built before running destroy
Ensure installer image is built before running destroy

Change-Id: If0839b3f13f42db71f37a2af51f8eab41ab3595f

GoogleCloudPlatform/solutions-modern-cicd-anthos,GoogleCloudPlatform/solutions-modern-cicd-anthos,GoogleCloudPlatform/solutions-modern-cicd-anthos