[FLINK-17182][network] Fix the unstable input channel test by recycling exclusive and floating buffer in the same thread #11924
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What is the purpose of the change
This PR fixes the unstable input channel test.
Currently some test might be unstable with specific thread concurrency when we simulating the cases that recycling exclusive and floating buffers in different threads. However, in realistic there should be no such cases. Therefore, we could change the recycling into the same thread.
Brief change log
Verifying this change
This change is a trivial rework / code cleanup without any test coverage.
Does this pull request potentially affect one of the following parts:
@Public(Evolving)
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