[improve][cli] Add proxyServiceUrl / proxyProtocol parsing from conf file to pulsar-client CLI

[lhotari]

Motivation

#17862 added support for pulsar-perf CLI tools (with #17930 to fix some gaps).
It would be consistent to add support for specifying proxyServiceUrl & proxyProtocol in the configuration file also for pulsar-client CLI tool.

Modifications

Add proxyServiceUrl / proxyProtocol parsing from conf file to pulsar-client CLI.

Documentation

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

Matching PR in forked repository

PR in forked repository: lhotari#95

[github-actions]

The pr had no activity for 30 days, mark with Stale label.

[lhotari]

/pulsarbot rerun-failure-checks

[codecov-commenter]

Codecov Report

Merging #17932 (d9885c2) into master (67d9d63) will increase coverage by 6.81%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master   #17932      +/-   ##
============================================
+ Coverage     40.29%   47.10%   +6.81%     
- Complexity     8685    10331    +1646     
============================================
  Files           687      687              
  Lines         67441    67437       -4     
  Branches       7225     7226       +1     
============================================
+ Hits          27175    31768    +4593     
+ Misses        37257    32090    -5167     
- Partials       3009     3579     +570     

Flag	Coverage Δ
unittests	47.10% <0.00%> (+6.81%)	⬆️

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

Impacted Files	Coverage Δ
...che/bookkeeper/mledger/impl/ManagedCursorImpl.java	36.87% <0.00%> (-0.03%)	⬇️
...rg/apache/bookkeeper/mledger/impl/OpReadEntry.java	65.55% <ø> (+0.72%)	⬆️
.../transaction/TransactionCoordinatorClientImpl.java	0.00% <0.00%> (ø)
...rvice/schema/KeyValueSchemaCompatibilityCheck.java	21.62% <0.00%> (-45.95%)	⬇️
.../apache/pulsar/broker/loadbalance/LoadManager.java	61.11% <0.00%> (-16.67%)	⬇️
.../apache/pulsar/broker/admin/impl/PackagesBase.java	54.12% <0.00%> (-13.77%)	⬇️
...pulsar/broker/service/PulsarCommandSenderImpl.java	67.53% <0.00%> (-10.48%)	⬇️
...oker/service/schema/SchemaRegistryServiceImpl.java	56.75% <0.00%> (-8.11%)	⬇️
...tent/PersistentDispatcherSingleActiveConsumer.java	55.79% <0.00%> (-3.45%)	⬇️
...ookkeeper/mledger/impl/ManagedCursorContainer.java	76.03% <0.00%> (-3.31%)	⬇️
... and 196 more