[improve][test] Don't configure Mockito spying for MultiBrokerTestZKBaseTest

[lhotari]

Fixes #22239

Motivation

The AdvertisedListenersMultiBrokerLeaderElectionTest test is flaky since it times out.
I profiled the test with Async Profiler on Linux by adding this to pom.xml in <test.additional.args>

    <test.additional.args>
      -agentpath:/home/lari/tools/async-profiler-3.0-linux-x64/lib/libasyncProfiler.so=start,event=cpu,jfr,file=/tmp/profile${maven.build.timestamp}_${surefire.forkNumber}.jfr

and converting the .jfr file to .html with java -jar tools/async-profiler-3.0-macos/lib/converter.jar jfr2flame profile2024-03-12T10:44:25Z_1.jfr output.html and java -jar tools/async-profiler-3.0-macos/lib/converter.jar jfr2flame --threads profile2024-03-12T10:44:25Z_1.jfr output_threads.html.
In the profile, I could see that Mockito was causing a lot of overhead to the execution.

Modifications

• add .spyNoneByDefault() to PulsarTestContext.Builder
• use this in MultiBrokerTestZKBaseTest

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.64%. Comparing base (bbc6224) to head (f49fdca).
Report is 1140 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #22250      +/-   ##
============================================
+ Coverage     73.57%   73.64%   +0.06%     
+ Complexity    32624    32172     -452     
============================================
  Files          1877     1879       +2     
  Lines        139502   139793     +291     
  Branches      15299    15338      +39     
============================================
+ Hits         102638   102944     +306     
+ Misses        28908    28862      -46     
- Partials       7956     7987      +31     

Flag	Coverage Δ
inttests	26.59% <ø> (+2.00%)	⬆️
systests	24.40% <ø> (+0.07%)	⬆️
unittests	72.89% <ø> (+0.04%)	⬆️

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see 82 files with indirect coverage changes

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