[INLONG-6907][SortStandalone] Support to close StatsRecorder of pulsar client

[luchunliang]

• Title Example: [INLONG-6907][SortStandalone] Support to close StatsRecorder of pulsar client
• Fixes [Feature][SortStandalone] Support to close StatsRecorder of pulsar client #6907

Motivation

Explain here the context, and why you're making that change. What is the problem you're trying to solve?

Modifications

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Verifying this change

(Please pick either of the following options)

• This change is a trivial rework/code cleanup without any test coverage.

• This change is already covered by existing tests, such as:
  (please describe tests)

• This change added tests and can be verified as follows:

  (example:)

  • Added integration tests for end-to-end deployment with large payloads (10MB)
  • Extended integration test for recovery after broker failure

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)
• If a feature is not applicable for documentation, explain why?
• If a feature is not documented yet in this PR, please create a follow-up issue for adding the documentation

[dockerzhang]

@luchunliang please rebase from master and build locally before creating a PR, and it will fix the format error automatically.

[vernedeng]

lgtm