[YUNIKORN-2848] Refactor preemption_queue_test.go

[ryankert01]

What is this PR for?

Refactor TestGetPreemptableResource test based on variables and syntax constructs used in TestGetRemainingGuaranteedResource.

For example, variables defined for test resources like res1, res2 etc and t.Run({})

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-2848

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

All modified and coverable lines are covered by tests ✅

Project coverage is 81.29%. Comparing base (44705ae) to head (fa7cb88).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #983      +/-   ##
==========================================
- Coverage   81.50%   81.29%   -0.21%     
==========================================
  Files          97       97              
  Lines       12625    15463    +2838     
==========================================
+ Hits        10290    12571    +2281     
- Misses       2052     2611     +559     
+ Partials      283      281       -2     

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[craigcondit]

See comments.

[craigcondit]

+1 LGTM.