Mask credentials in debug endpoint /appconfigs

[ramabme]

Description

Mask credentials in debug endpoint /appconfigs using the Obfuscator class

Upgrade Notes

Does this PR prevent a zero down-time upgrade? (Assume upgrade order: Controller, Broker, Server, Minion)

• Yes (Please label as backward-incompat, and complete the section below on Release Notes)

Does this PR fix a zero-downtime upgrade introduced earlier?

• Yes (Please label this as backward-incompat, and complete the section below on Release Notes)

Does this PR otherwise need attention when creating release notes? Things to consider:

• New configuration options
• Deprecation of configurations
• Signature changes to public methods/interfaces
• New plugins added or old plugins removed

• Yes (Please label this PR as release-notes and complete the section on Release Notes)

Release Notes

Documentation

[codecov-commenter]

Codecov Report

Merging #7452 (4c96b22) into master (0069fc3) will increase coverage by 0.23%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #7452      +/-   ##
============================================
+ Coverage     64.84%   65.08%   +0.23%     
+ Complexity     3379     3377       -2     
============================================
  Files          1508     1472      -36     
  Lines         74883    73426    -1457     
  Branches      10925    10771     -154     
============================================
- Hits          48561    47788     -773     
+ Misses        22857    22234     -623     
+ Partials       3465     3404      -61     

Flag	Coverage Δ
integration1	?
integration2	?
unittests1	69.79% <100.00%> (-0.02%)	⬇️
unittests2	14.51% <0.00%> (?)

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

Impacted Files	Coverage Δ
...org/apache/pinot/common/utils/PinotAppConfigs.java	64.70% <100.00%> (ø)
...a/org/apache/pinot/common/metrics/MinionMeter.java	0.00% <0.00%> (-100.00%)	⬇️
...g/apache/pinot/common/metrics/ControllerMeter.java	0.00% <0.00%> (-100.00%)	⬇️
.../apache/pinot/common/metrics/BrokerQueryPhase.java	0.00% <0.00%> (-100.00%)	⬇️
.../apache/pinot/common/metrics/MinionQueryPhase.java	0.00% <0.00%> (-100.00%)	⬇️
...he/pinot/common/messages/SegmentReloadMessage.java	0.00% <0.00%> (-100.00%)	⬇️
...pinot/core/data/manager/realtime/TimerService.java	0.00% <0.00%> (-100.00%)	⬇️
...pinot/minion/exception/TaskCancelledException.java	0.00% <0.00%> (-100.00%)	⬇️
...t/core/startree/plan/StarTreeDocIdSetPlanNode.java	0.00% <0.00%> (-100.00%)	⬇️
...ot/common/restlet/resources/TableMetadataInfo.java	0.00% <0.00%> (-100.00%)	⬇️
... and 493 more

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