[frontend] Fix names truncated when exporting a Radar widget as CSV(#5969)

[CelineSebe]

Proposed changes

• [frontend] delete formatter to fix names truncated
• [frontend] add the mitre id as prefix to StixRelationShipsHorizontalBars to fix inconsistent labelling in charts

Related issues

• Names are truncated when exporting a Radar widget as CSV #5969

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

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (888a5e0) 65.70% compared to head (918e84a) 65.72%.
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6040      +/-   ##
==========================================
+ Coverage   65.70%   65.72%   +0.02%     
==========================================
  Files         539      539              
  Lines       63482    63492      +10     
  Branches     5129     5165      +36     
==========================================
+ Hits        41711    41731      +20     
+ Misses      21771    21761      -10     

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