[release-3.1] update workflow for release-3.1
Created by: ks-ci-bot
This is an automated cherry-pick of #1548
A successfully merged pr of master or release-3.1 branch triggers an update of ks-installer's image, and tag are latest and release-3.1
Created by: ks-ci-bot
This is an automated cherry-pick of #1548
A successfully merged pr of master or release-3.1 branch triggers an update of ks-installer's image, and tag are latest and release-3.1