[fix][test] Fix flaky NegativeAcksTest.testNegativeAcksWithBackoff

[hanmz]

Motivation

This test sometimes blocks at consumer.receive() at line 261. The problem is introduced in this PR https://github.com/apache/pulsar/pull/23986. For batch sending scenarios, the current way of creating producers cannot guarantee that all messages are sent out in one batch. Therefore, for batch messages, executing consumer。negativeAcknowledge only once is not enough.

Modifications

By adding batchingMaxPublishDelay when creating the producer, all messages are guaranteed to be sent together.

Documentation

• [ ] doc
• [ ] doc-required
• [x] doc-not-needed
• [ ] doc-complete

[codecov-commenter]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 72.74%. Comparing base (bbc6224) to head (e69059f). :warning: Report is 1271 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #24342      +/-   ##
============================================
- Coverage     73.57%   72.74%   -0.84%     
+ Complexity    32624    32191     -433     
============================================
  Files          1877     1869       -8     
  Lines        139502   158700   +19198     
  Branches      15299    19957    +4658     
============================================
+ Hits         102638   115443   +12805     
- Misses        28908    33984    +5076     
- Partials       7956     9273    +1317     

Flag	Coverage Δ
inttests	28.60% <ø> (+4.02%)	:arrow_up:
systests	24.81% <ø> (+0.48%)	:arrow_up:
unittests	72.05% <ø> (-0.79%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more. see 1090 files with indirect coverage changes

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