[frontend/backend] feat(simulation): fix inject name longer (#4635)

[GaetanSantucci]

Inject failed if we create one with a expectation's name longer than 255 characters, we need to block this.

Proposed changes

Implementation of double front-end and back-end validation to prevent entries exceeding 255 characters in the input name field

Testing Instructions

Steps to create the smallest reproducible scenario:

Create a simulation
Create a mail inject in it with a manual expectation with a name longer than 255 characters
Launch the simulation, the inject is executed but with an error and with the PARTIAL status

Related issues

• Inject failed if the name of the expectation is too long #4635

Further comments

The remaining challenge will be to better manage the backend return error for a display that's better than a 500 error, but that will require a comprehensive platform-wide effort.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.58%. Comparing base (c7c716f) to head (b914402).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #4723      +/-   ##
============================================
+ Coverage     50.57%   50.58%   +0.01%     
- Complexity     3708     3711       +3     
============================================
  Files           903      903              
  Lines         26820    26820              
  Branches       2012     2012              
============================================
+ Hits          13564    13568       +4     
+ Misses        12437    12435       -2     
+ Partials        819      817       -2     

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