[backend] add validation mode to askJobImport (#6728)

[JeremyCloarec]

Proposed changes

• add background task handling
• add validation mode to askJobImport
• add config for automatic import validation mode
• handle draft validation mode in import csv connector
• changed reindex script to static instead of dynamic
• fix handling of draft_context in user

Related issues

• Ensure readiness of draft feature & transition period #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 58.73016% with 26 lines in your changes missing coverage. Please review.

Project coverage is 66.05%. Comparing base (913e1a7) to head (9bdce14).
Report is 25 commits behind head on release/6.5.0.

Files with missing lines	Patch %	Lines
...hql/src/connector/importCsv/importCsv-connector.ts	6.25%	15 Missing ⚠️
...latform/opencti-graphql/src/manager/taskManager.js	73.91%	6 Missing ⚠️
...pencti-platform/opencti-graphql/src/domain/file.js	0.00%	2 Missing ⚠️
...pencti-graphql/src/domain/backgroundTask-common.js	0.00%	1 Missing ⚠️
...tform/opencti-graphql/src/domain/backgroundTask.js	0.00%	1 Missing ⚠️
...ti-platform/opencti-graphql/src/http/httpServer.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##           release/6.5.0    #9249      +/-   ##
=================================================
+ Coverage          65.21%   66.05%   +0.83%     
=================================================
  Files                626      626              
  Lines              59892    60366     +474     
  Branches            6688     7386     +698     
=================================================
+ Hits               39059    39873     +814     
+ Misses             20833    20493     -340     

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

[SouadHadjiat]

I'm wondering if we shouldn't have an enum here instead of String ? so it can either be workbench or draft, not any string.