Add lifecycle to core dpl

[derekcha]

Hello, I'm using Harbor so well, and I'm glad I was able to raise a PR like this.

What improvements does these changes make? A 504 or EOF error occurred when rolling while using Harbor. It looks like the pods aren't being cleaned up properly on shutdown (possibly because there is a port after AWS LB). So I tested randomly setting the prestop(sleep 60) lifecycle for containers in Harbor Core and no errors occurred. So, I am uploading a PR so that lifecycle settings can be done through this chart.

I will write down the link to the issue I registered below. https://github.com/goharbor/harbor-helm/issues/1722