[feat] add volume and volumeMounts support for ddc

[gohalo]

What problem does this PR solve?

Add volume and volumeMounts support for ddc.

apiVersion: disaggregated.cluster.doris.com/v1
kind: DorisDisaggregatedCluster
metadata:
  name: simple-cluster
spec:
  computeGroups:
      volumeMounts:
      - mountPath: /usr/local/nagent
        name: nagent
        mountPropagation: HostToContainer
      volumes:
      - hostPath:
          path: /usr/local/nagent
          type: ""
        name: nagent

Issue Number: close #xxx

Related PR: #xxx

Problem Summary:

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label