[INLONG-3149][Manager] Support async method for Inlong group stop/restart/delete

[kipshi]

Title Name: [INLONG-3149] Support async method in Inlong group stop/restart/delete

where XYZ should be replaced by the actual issue number.

Fixes #3149

Motivation

To fix TimeoutException of invokers

Modifications

Verifying this change

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

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

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This change added tests and can be verified as follows:

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

Documentation

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• If a feature is not documented yet in this PR, please create a followup issue for adding the documentation

[healchow]

LGTM