enable Netty native transports in ClusterTest

[sullis]

Motivation

by default NettyConfig does not use native transports.

Modifications

• update Netty properties in ClusterTest.java

Result

This change enables Netty native transports for all integration tests.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.48%. Comparing base (59551e4) to head (031634c).
Report is 133 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #12527      +/-   ##
============================================
- Coverage     61.75%   61.48%   -0.28%     
+ Complexity      207      198       -9     
============================================
  Files          2436     2452      +16     
  Lines        133233   133848     +615     
  Branches      20636    20766     +130     
============================================
+ Hits          82274    82291      +17     
- Misses        44911    45394     +483     
- Partials       6048     6163     +115     

Flag	Coverage Δ
custom-integration1	<0.01% <ø> (-0.01%)	⬇️
integration	<0.01% <ø> (-0.01%)	⬇️
integration1	<0.01% <ø> (-0.01%)	⬇️
integration2	0.00% <ø> (ø)
java-11	61.40% <ø> (-0.31%)	⬇️
java-21	61.35% <ø> (-0.27%)	⬇️
skip-bytebuffers-false	61.44% <ø> (-0.30%)	⬇️
skip-bytebuffers-true	61.32% <ø> (+33.59%)	⬆️
temurin	61.48% <ø> (-0.28%)	⬇️
unittests	61.47% <ø> (-0.28%)	⬇️
unittests1	46.38% <ø> (-0.51%)	⬇️
unittests2	27.75% <ø> (+0.02%)	⬆️

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[Jackie-Jiang]

Should we consider testing both native and non-native? Basically randomly choose whether to set the flag

[sullis]

for discussion: enable native transports by default in NettyConfig.java

#12577