[backend] check user access rights before merging

[JeremyCloarec]

Proposed changes

• We now check that the user has access to all related relations before merging

Related issues

• #7043

Checklist

• [x] I consider the submitted work as finished
• [x] 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[bot]]

Codecov Report

Attention: Patch coverage is 65.21739% with 8 lines in your changes missing coverage. Please review.

Project coverage is 67.56%. Comparing base (7b1f42b) to head (124548a). Report is 4 commits behind head on master.

Files	Patch %	Lines
...latform/opencti-graphql/src/database/middleware.js	75.00%	5 Missing :warning:
...latform/opencti-graphql/src/manager/taskManager.js	0.00%	3 Missing :warning:

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6989   +/-   ##
=======================================
  Coverage   67.56%   67.56%           
=======================================
  Files         567      567           
  Lines       69903    69917   +14     
  Branches     5937     5939    +2     
=======================================
+ Hits        47228    47239   +11     
- Misses      22675    22678    +3     

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