[fix][flaky-test]TxnLogBufferedWriterTest.testMainProcess

[poorbarcode]

Fixes #16989, #16723

Master Issue: #16989, #16723

Motivation

• #16989: We mocked a BK error, but if an exception occurs, the failure callback will be executed earlier. So the results of the callbacks will be out of order, and mismatch occur.
• #16723: I'm sorry, but after PR #16982 I found another reason makes unit test flaky, Multi threads access to ArrayList causes the 'list.size()' to return incorrect results, leading to Awaitility.await().until(() -> contextArrayOfCallback.size() == writeCmdExecuteCount) cannot end.

Modifications

• #16989: If we mocked BK errors, sort the callback results.
• #16723: Make collection objects to thread safety.
• Remove unstable assertions. I will rewrite these two cases after PR #16758, because that PR has really changed a lot

Assert.assertTrue(exceptionCallbackCount > 0);
Assert.assertTrue(positionCallbackCount > 0);

Documentation

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• [ ] doc (Your PR contains doc changes)

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[poorbarcode]

/pulsarbot rerun-failure-checks