Revert "[backend/frontend] modify EntityStixCoreRelationshipsEntitiesComponent to list entities through relations (#6867)"

[SouadHadjiat]

This reverts commit 2019c63.

It was causing this issue #7625 and was breaking the toolbar (which had no more filters)

[codecov]

Codecov Report

Attention: Patch coverage is 53.52113% with 33 lines in your changes missing coverage. Please review.

Project coverage is 67.59%. Comparing base (1b688ec) to head (105d648).

Files	Patch %	Lines
...tform/opencti-graphql/src/domain/stixCoreObject.js	12.50%	7 Missing ⚠️
...atform/opencti-graphql/src/domain/attackPattern.ts	25.00%	3 Missing ⚠️
.../opencti-graphql/src/domain/stixCyberObservable.js	0.00%	3 Missing ⚠️
...ncti-platform/opencti-graphql/src/domain/region.js	50.00%	2 Missing ⚠️
...platform/opencti-graphql/src/domain/threatActor.js	0.00%	2 Missing ⚠️
.../modules/malwareAnalysis/malwareAnalysis-domain.ts	0.00%	2 Missing ⚠️
...-graphql/src/modules/narrative/narrative-domain.ts	0.00%	2 Missing ⚠️
...ql/src/modules/organization/organization-domain.ts	50.00%	2 Missing ⚠️
...rm/opencti-graphql/src/modules/task/task-domain.ts	0.00%	2 Missing ⚠️
...encti-platform/opencti-graphql/src/domain/group.js	50.00%	1 Missing ⚠️
... and 7 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7641      +/-   ##
==========================================
+ Coverage   67.54%   67.59%   +0.05%     
==========================================
  Files         567      567              
  Lines       69955    69881      -74     
  Branches     5935     5932       -3     
==========================================
- Hits        47251    47238      -13     
+ Misses      22704    22643      -61     

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[aHenryJard]

Looks good