[YUNIKORN-3121] Add REST Endpoint for Scheduling Order Visibility

[mitdesai]

What is this PR for?

Added a new Rest Endpoint for getting the scheduling order - These come in handy when debugging issues in scheduling.

What type of PR is it?

• - Bug Fix
• - Improvement
• - Feature
• - Documentation
• - Hot Fix
• - Refactoring

Todos

• - Task

What is the Jira issue?

https://issues.apache.org/jira/browse/YUNIKORN-3121

How should this be tested?

Screenshots (if appropriate)

Questions:

• - The licenses files need update.
• - There is breaking changes for older versions.
• - It needs documentation.

[codecov]

Codecov Report

❌ Patch coverage is 35.00000% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.32%. Comparing base (fde27e5) to head (4e2c901).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/scheduler/objects/queue.go	0.00%	22 Missing ⚠️
pkg/scheduler/partition.go	0.00%	2 Missing ⚠️
pkg/webservice/handlers.go	87.50%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1042      +/-   ##
==========================================
+ Coverage   80.91%   81.32%   +0.40%     
==========================================
  Files          99      101       +2     
  Lines       12882    13322     +440     
==========================================
+ Hits        10424    10834     +410     
- Misses       2201     2229      +28     
- Partials      257      259       +2     

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[pbacsko]

@mitdesai please take care of the linter problem. You can check locally by running "make lint".