[frontend] 'sighting' export from an entity exports all the sightings of the platform (#6761)

[ValentinBouzinFiligran]

Proposed changes

• filter added for sighting relations query

Related issues

• https://github.com/OpenCTI-Platform/opencti/issues/6761

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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 67.41%. Comparing base (ab46992) to head (d59ef6b).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6926   +/-   ##
=======================================
  Coverage   67.41%   67.41%           
=======================================
  Files         561      561           
  Lines       68510    68510           
  Branches     5712     5712           
=======================================
  Hits        46184    46184           
  Misses      22326    22326           

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[Archidoit]

Open the export panel of an observable sightings > you also see the exports that have been done for other observables sightings list