[YUNIKORN-2924] [core] Remove occupiedResource handling logic

[pbacsko]

What is this PR for?

Remove code that deals with occupiedResource.

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-2924

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 81.50%. Comparing base (44705ae) to head (2b99742).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #984   +/-   ##
=======================================
  Coverage   81.50%   81.50%           
=======================================
  Files          97       97           
  Lines       12625    12623    -2     
=======================================
- Hits        10290    10289    -1     
- Misses       2052     2053    +1     
+ Partials      283      281    -2     

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[pbacsko]

Note: e2e tests has passed w/o go.mod/go.sum update.

[manirajv06]

looks good