[improve][broker] Remove ConcurrentOpenHashMap and ConcurrentOpenHashSet

[BewareMyPower]

Main Issue: #23215

Motivation

This is the last PR that removes all left ConcurrentOpenHashXxx references from the code base. Ignored the removals of these two classes and tests, the changes are only +40-90.

Documentation

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

Matching PR in forked repository

PR in forked repository: BewareMyPower#37

[BewareMyPower]

Though it's ready to merge now (all required tests passed). Let's wait for the flaky test result and see if there are some regressions.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 94.11765% with 1 line in your changes missing coverage. Please review.

Project coverage is 74.58%. Comparing base (bbc6224) to head (5f4bfa4).
Report is 595 commits behind head on master.

Files with missing lines	Patch %	Lines
...kkeeper/mledger/impl/ManagedLedgerFactoryImpl.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #23329      +/-   ##
============================================
+ Coverage     73.57%   74.58%   +1.01%     
- Complexity    32624    34443    +1819     
============================================
  Files          1877     1934      +57     
  Lines        139502   144980    +5478     
  Branches      15299    15838     +539     
============================================
+ Hits         102638   108136    +5498     
+ Misses        28908    28560     -348     
- Partials       7956     8284     +328     

Flag	Coverage Δ
inttests	27.49% <82.35%> (+2.91%)	⬆️
systests	24.55% <64.70%> (+0.22%)	⬆️
unittests	73.95% <94.11%> (+1.10%)	⬆️

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

Files with missing lines	Coverage Δ
...ache/pulsar/broker/namespace/NamespaceService.java	73.37% <100.00%> (+1.14%)	⬆️
...roker/service/persistent/MessageDeduplication.java	80.00% <100.00%> (-0.92%)	⬇️
...pulsar/broker/stats/ClusterReplicationMetrics.java	100.00% <100.00%> (ø)
...va/org/apache/pulsar/client/impl/ConsumerBase.java	74.82% <100.00%> (+0.70%)	⬆️
...va/org/apache/pulsar/client/impl/ConsumerImpl.java	79.95% <100.00%> (+2.37%)	⬆️
...he/pulsar/client/impl/PartitionedProducerImpl.java	81.11% <100.00%> (+0.34%)	⬆️
...va/org/apache/pulsar/client/impl/ProducerBase.java	82.35% <100.00%> (+3.50%)	⬆️
.../org/apache/pulsar/websocket/WebSocketService.java	80.14% <100.00%> (-1.11%)	⬇️
.../org/apache/pulsar/websocket/stats/ProxyStats.java	83.78% <100.00%> (-0.43%)	⬇️
...kkeeper/mledger/impl/ManagedLedgerFactoryImpl.java	59.04% <0.00%> (-22.34%)	⬇️

... and 590 files with indirect coverage changes