[INLONG-8647][Agent] Stop sending task snapshot to manager

[justinwwhuang]

stop sending task snapshot to manager, manger never use the snapshot.

Prepare a Pull Request

• Fixes [Improve][Agent] Stop sending task snapshot to Manager module #8647

Motivation

manger never use the snapshot

Modifications

stop sending task snapshot to manager

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