[frontend] fix malware variants missing from relationships (#9531)

[delemaf]

Proposed changes

• In Arsenal > Malwares > Knowledge > Variants fix relationships view allowing allDirections
• Handle relationship icon change when relation is from or to entity
  

Related issues

• Close Linked entity and relationship lists inconsistent in knowledge tab #9531

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

[CelineSebe]

Tested 👌

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.30%. Comparing base (d695e99) to head (8bc66a9).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #9870   +/-   ##
=======================================
  Coverage   64.29%   64.30%           
=======================================
  Files         655      655           
  Lines       62938    62938           
  Branches     6969     6975    +6     
=======================================
+ Hits        40469    40471    +2     
+ Misses      22469    22467    -2     

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