[improve][ci] Add pulsar-client test group

[yaalsn]

Motivation

pulsar-client test group is not in CI, but this module is important and we need to make sure of its quality.

Verifying this change

• Make sure that the change passes the CI checks.

Documentation

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

Matching PR in forked repository

PR in forked repository: https://github.com/yaalsn/pulsar/pull/15

[mattisonchao]

@lhotari Could you please take a look at this PR?

[codecov-commenter]

Codecov Report

Merging #18298 (ed66cc8) into master (0866c3a) will decrease coverage by 4.45%.
The diff coverage is 48.43%.

@@             Coverage Diff              @@
##             master   #18298      +/-   ##
============================================
- Coverage     38.97%   34.51%   -4.46%     
+ Complexity     8311     6493    -1818     
============================================
  Files           683      608      -75     
  Lines         67325    58071    -9254     
  Branches       7217     6054    -1163     
============================================
- Hits          26239    20043    -6196     
+ Misses        38079    35387    -2692     
+ Partials       3007     2641     -366     

Flag	Coverage Δ
unittests	34.51% <48.43%> (-4.46%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../main/java/org/apache/pulsar/PulsarStandalone.java	0.00% <ø> (ø)
...che/pulsar/broker/BookKeeperClientFactoryImpl.java	0.00% <0.00%> (ø)
.../org/apache/pulsar/broker/admin/AdminResource.java	32.02% <0.00%> (-34.49%)	⬇️
...pulsar/broker/admin/impl/PersistentTopicsBase.java	11.96% <0.00%> (-40.34%)	⬇️
...pache/pulsar/broker/admin/v2/PersistentTopics.java	6.63% <0.00%> (-64.17%)	⬇️
...pulsar/broker/service/PulsarCommandSenderImpl.java	70.68% <ø> (-3.68%)	⬇️
...ersistentStreamingDispatcherMultipleConsumers.java	0.00% <0.00%> (ø)
...sar/broker/service/persistent/PersistentTopic.java	44.51% <0.00%> (-12.47%)	⬇️
...ransaction/buffer/impl/InMemTransactionBuffer.java	0.00% <ø> (ø)
...nsaction/buffer/impl/TransactionBufferDisable.java	52.63% <ø> (ø)
... and 394 more

[yaalsn]

/pulsarbot rerun-failure-checks

[lhotari]

@lhotari Could you please take a look at this PR?

@mattisonchao I didn't have time to review before this was merged. /cc @codelipenghui

pulsar-client test group is not in CI, but this module is important and we need to make sure of its quality.

@yaalsn The pulsar-client module tests were run as part of the OTHER test group and continue to run as part of that group. I created PR #18339 to address that.

[lhotari]

I hope Pulsar CI changes like this could be reviewed carefully before merging so that we don't needlessly make changes. If gaps are detected, it's worth bringing up to discussion on dev mailing list or on Pulsar slack on the #testing channel.