[backend] add action to remove entity from draft (#6728)

[JeremyCloarec]

Linked PR: OpenCTI-Platform/client-python#824

Proposed changes

• add mutation & background task action to remove current entity changes from draft
• re-enable background tasks in draft
• clean up draft_ids from works when draft is deleted
• add draft chip & draft color to relationships

Related issues

• Draft: finish last chunk & test ux worklow  #6728

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

[codecov]

Codecov Report

Attention: Patch coverage is 16.86391% with 281 lines in your changes missing coverage. Please review.

Project coverage is 64.72%. Comparing base (1442c72) to head (fe8df6a).
Report is 8 commits behind head on release/6.6.0.

Files with missing lines	Patch %	Lines
...tform/opencti-graphql/src/database/draft-engine.js	5.08%	168 Missing ⚠️
...ti-platform/opencti-graphql/src/database/engine.js	8.57%	64 Missing ⚠️
...atform/opencti-graphql/src/database/draft-utils.js	38.46%	16 Missing ⚠️
...tform/opencti-graphql/src/domain/stixCoreObject.js	11.11%	8 Missing ⚠️
...opencti-graphql/src/domain/stixCoreRelationship.js	11.11%	8 Missing ⚠️
...cti-graphql/src/domain/stixSightingRelationship.js	11.11%	8 Missing ⚠️
...rc/modules/draftWorkspace/draftWorkspace-domain.ts	77.77%	4 Missing ⚠️
...cti-platform/opencti-graphql/src/database/redis.ts	75.00%	2 Missing ⚠️
...latform/opencti-graphql/src/manager/taskManager.js	33.33%	2 Missing ⚠️
...rm/opencti-graphql/src/resolvers/stixCoreObject.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##           release/6.6.0    #9684      +/-   ##
=================================================
+ Coverage          64.29%   64.72%   +0.42%     
=================================================
  Files                655      655              
  Lines              62909    63291     +382     
  Branches            6966     7480     +514     
=================================================
+ Hits               40450    40965     +515     
+ Misses             22459    22326     -133     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.