Feat: Pod scheduling control

Created by: leoendless

What would you like to be added:

Design a suitable way to make pod scheduling control more convenient and flexible.

Functions to be implemented:

1. Support to edit affinity and anti-affinity through UI.
2. Support to edit pod's node selector through UI.

Why is this needed:

Refer to https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node

In many cases, pods need to be scheduled to specific nodes, or scheduled with pods of certain services, or prevent from being scheduled to specific nodes, etc.

Currently, ks-console only partially supports affinity, allowing centralized or decentralized scheduling of workload pods.

And edit the node selector in the [Advanced Settings]. But after the workload is created, the node selector can no longer be modified through the UI.