Support for podAntiAffinity with match labels of deployment name or other finer-grained label

Summary

The current podAntiAffinity label uses chart name by default.

when I turn antiAffinity to hard，There are many Pending pods in our k8s cluster. Because the few number of nodes cannot achieve anti-affinity scheduling for all pods.

For example, all sidekiq services use the label app=sidekiq as podAntiAffinity label, and the sidekiq service has 12 deployments, which means that at least 12 k8s nodes are needed to implement hard podAntiAffinity. this is not reasonable.

So, I need a way to change the podAntiAffinity label to a deployment name or other finer-grained label. Your help is needed，Thank you!

Steps to reproduce

1. Turn antiAffinity to hard
2. There are many Pending pods appearing in the k8s cluster

Configuration used

# global values.yaml

antiAffinity: hard

Versions

• Chart: 5.1.1
• Platform:
  • Cloud: (Tencent Kubernetes Engine)
• Kubernetes: (kubectl version)
  • Client: 1.21.0
  • Server: v1.18.4-tke.9
• Helm: (helm version)
  • Client: v3.5.0
  • Server: v3.5.0