[backend] CSV Mapper - fix how to retrieve entity settings (#6034)

[lndrtrbn]

Proposed changes

• Change how we retrieve the entity settings to be able to fetch parent type when necessary (for stix core relationships)

Related issues

• CSV Mapper - Required fields are not highlighted in relationship representations #6034

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

Use the function getEntitySettingFromCache instead of directly calling the cache with getEntitiesListFromCache because the first one manage the fact to fetch entity settings from parent type which is not the case with the second one. So need to readapt the code to work with this function.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b21a6fe) 65.94% compared to head (ecebc48) 66.13%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6041      +/-   ##
==========================================
+ Coverage   65.94%   66.13%   +0.18%     
==========================================
  Files         541      541              
  Lines       64286    64279       -7     
  Branches     5199     5219      +20     
==========================================
+ Hits        42393    42509     +116     
+ Misses      21893    21770     -123     

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[JeremyCloarec]

Tested OK on the front end side.
As for the test failing, I think the cache doesn't contain the update done in the beforeAll query? I'm not familiar enough with the cache behavior to be sure though