[improve][broker] check system topic is used before configuring system topic (ExtensibleLoadManagerImpl only)

[heesung-sohn]

Motivation

This PR(#23301) introduces the ServiceUnitStateMetadataStoreTableView, which persists ownership information in metadata store. When this is used, we don't need to configure system topic in the monitor thread. Currently, the monitor thread unnecessarily tries to configure the system topic and prints red-herring error logs Failed to set compaction threshold for system topic:persistent://pulsar/system/loadbalancer-service-unit-state

Modifications

• check if the system topic is used before calling the configureSystemTopics

Verifying this change

• Make sure that the change passes the CI checks.

Does this pull request potentially affect one of the following parts:

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

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

Matching PR in forked repository

PR in forked repository:

[github-actions]

@heesung-sn Please add the following content to your PR description and select a checkbox:

- [ ] `doc` <!-- Your PR contains doc changes -->
- [ ] `doc-required` <!-- Your PR changes impact docs and you will update later -->
- [ ] `doc-not-needed` <!-- Your PR changes do not impact docs -->
- [ ] `doc-complete` <!-- Docs have been already added -->

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 74.51%. Comparing base (bbc6224) to head (533bc01).
Report is 617 commits behind head on master.

Files with missing lines	Patch %	Lines
...dbalance/extensions/ExtensibleLoadManagerImpl.java	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #23381      +/-   ##
============================================
+ Coverage     73.57%   74.51%   +0.93%     
- Complexity    32624    34471    +1847     
============================================
  Files          1877     1934      +57     
  Lines        139502   145139    +5637     
  Branches      15299    15870     +571     
============================================
+ Hits         102638   108149    +5511     
+ Misses        28908    28691     -217     
- Partials       7956     8299     +343     

Flag	Coverage Δ
inttests	27.68% <66.66%> (+3.09%)	⬆️
systests	24.49% <0.00%> (+0.17%)	⬆️
unittests	73.87% <66.66%> (+1.02%)	⬆️

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

Files with missing lines	Coverage Δ
...dbalance/extensions/ExtensibleLoadManagerImpl.java	78.38% <66.66%> (-1.71%)	⬇️

... and 599 files with indirect coverage changes