[FEATURES] Dataset nodeAffinity should support matchFields

[TrafalgarZZZ]

What feature you'd like to add: For now, Fluid allow nodeAffinity.required.nodeSelectorTerms[i].matchFields to be defined in Dataset while it is ignored and takes no effect.

Dataset nodeAffinity should support matchFields like this:

nodeAffinity:
  required:
    nodeSelectorTerms:
      - matchFields:
        - key: metadata.name
           operator: In
           values:
           - target-host-name

Why is this feature needed: To make affinity fields of Dataset be consistent with affinity fields of Pods.

This is useful when users want to deploy Runtimes on some specific hosts.