[improve] [broker] Add overrideBrokerNics for adaptation of heterogeneous network environments

[dongzhonghua]

Motivation

add overrideBrokerNics for adaptation to heterogeneous network environments

Modifications

• add loadBalancerOverrideBrokerNicSpeedGbps configuration, use overrideBrokerNics if loadBalancerOverrideBrokerNicSpeedGbps is not empty else get usable physical NICs.

Documentation

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

Matching PR in forked repository

PR in forked repository:

[github-actions]

@dongzhonghua 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

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 74.28%. Comparing base (7c343d0) to head (695852e).
⚠️ Report is 49 commits behind head on master.

Files with missing lines	Patch %	Lines
.../apache/pulsar/broker/tools/LoadReportCommand.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #24883      +/-   ##
============================================
+ Coverage     74.24%   74.28%   +0.04%     
- Complexity    33911    34069     +158     
============================================
  Files          1913     1920       +7     
  Lines        149510   150305     +795     
  Branches      17373    17450      +77     
============================================
+ Hits         110997   111648     +651     
- Misses        29685    29754      +69     
- Partials       8828     8903      +75     

Flag	Coverage Δ
inttests	26.44% <60.00%> (+0.15%)	⬆️
systests	22.78% <60.00%> (+0.06%)	⬆️
unittests	73.82% <80.00%> (+0.04%)	⬆️

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

Files with missing lines	Coverage Δ
...org/apache/pulsar/broker/ServiceConfiguration.java	98.22% <100.00%> (+0.02%)	⬆️
...ker/loadbalance/impl/LinuxBrokerHostUsageImpl.java	86.36% <100.00%> (+6.67%)	⬆️
.../apache/pulsar/broker/tools/LoadReportCommand.java	6.06% <0.00%> (ø)

... and 114 files with indirect coverage changes

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