[backend/frontend] Danger zone: Add config in platform settings (#8284)

[marieflorescontact]

Proposed changes

• Add platform_protected_sensitive_config in Default.json
• frontend get config from Settings

Related issues

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]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.30%. Comparing base (7d60d33) to head (c9b1a9e).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8741      +/-   ##
==========================================
+ Coverage   66.29%   66.30%   +0.01%     
==========================================
  Files         597      597              
  Lines       60958    60959       +1     
  Branches     6262     6264       +2     
==========================================
+ Hits        40412    40420       +8     
+ Misses      20546    20539       -7     

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