[improve][test] Improve KeySharedSubscriptionTest to reduce the execution time

[poorbarcode]

Fixes #17635

• slowly-test: KeySharedSubscriptionTest #17635

Modifications

• Use the namespace-clean instead pulsar-restart, saves pulsar.start() and pulsar.stop() time before and after each method.

After improve, KeySharedSubscriptionTest cost 210s

[INFO] Tests run: 43, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 210.841 s - in org.apache.pulsar.client.api.KeySharedSubscriptionTest

Documentation

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

Matching PR in forked repository

PR in forked repository:

• [ci-run][improve][test] Improve KeySharedSubscriptionTest to reduce the execution time poorbarcode/pulsar#23

[codecov-commenter]

Codecov Report

Merging #18027 (bedf413) into master (6c65ca0) will increase coverage by 5.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master   #18027      +/-   ##
============================================
+ Coverage     34.91%   39.95%   +5.03%     
- Complexity     5707     6382     +675     
============================================
  Files           607      607              
  Lines         53396    53400       +4     
  Branches       5712     5712              
============================================
+ Hits          18644    21336    +2692     
+ Misses        32119    29172    -2947     
- Partials       2633     2892     +259     

Flag	Coverage Δ
unittests	39.95% <ø> (+5.03%)	⬆️

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

Impacted Files	Coverage Δ
...naming/RangeEquallyDivideBundleSplitAlgorithm.java	0.00% <0.00%> (-100.00%)	⬇️
...r/common/naming/NamespaceBundleSplitAlgorithm.java	0.00% <0.00%> (-61.54%)	⬇️
...on/buffer/impl/InMemTransactionBufferProvider.java	0.00% <0.00%> (-50.00%)	⬇️
...apache/pulsar/common/naming/BundleSplitOption.java	0.00% <0.00%> (-40.00%)	⬇️
...ar/broker/loadbalance/impl/SimpleResourceUnit.java	28.57% <0.00%> (-23.81%)	⬇️
...ar/broker/loadbalance/impl/BundleSplitterTask.java	57.77% <0.00%> (-20.01%)	⬇️
...e/pulsar/common/naming/NamespaceBundleFactory.java	36.66% <0.00%> (-16.12%)	⬇️
...g/apache/pulsar/broker/admin/impl/TenantsBase.java	29.07% <0.00%> (-12.77%)	⬇️
.../apache/pulsar/common/naming/NamespaceBundles.java	57.83% <0.00%> (-10.85%)	⬇️
...ersistentStickyKeyDispatcherMultipleConsumers.java	45.19% <0.00%> (-10.58%)	⬇️
... and 127 more

[poorbarcode]

/pulsarbot rerun-failure-checks