implement route 'infra / knowledge / incident' (#6415)

[frapuks]

Proposed changes

• Remove 3 buttons that shouldn't exist
• Create new route to display relashionship between Infrastructures and Incidents (types of relations : 'uses' / 'compromises')

Related issues

• fix Empty knowledge pages #6415

Checklist

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.31%. Comparing base (0c8c045) to head (d689842).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6419   +/-   ##
=======================================
  Coverage   67.30%   67.31%           
=======================================
  Files         541      541           
  Lines       65192    65192           
  Branches     5414     5416    +2     
=======================================
+ Hits        43879    43884    +5     
+ Misses      21313    21308    -5     

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