editoast: rename Unauthenticated to Unauthorized, Unauthorized to Forbidden

[hamz2a]

This PR updates the error messages to better align with HTTP status codes. Specifically, it renames the Unauthenticated error to Unauthorized and the Unauthorized error to Forbidden. This change improves clarity and consistency in our error handling.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 106 lines in your changes missing coverage. Please review.

Project coverage is 79.93%. Comparing base (41e05a4) to head (63a6612).
Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
editoast/src/views/infra/mod.rs	0.00%	14 Missing ⚠️
editoast/src/views/rolling_stock.rs	0.00%	8 Missing ⚠️
editoast/src/views/train_schedule.rs	0.00%	7 Missing ⚠️
editoast/src/views/work_schedules.rs	0.00%	6 Missing ⚠️
editoast/src/views/electrical_profiles.rs	0.00%	5 Missing ⚠️
editoast/src/views/projects.rs	0.00%	5 Missing ⚠️
editoast/src/views/rolling_stock/towed.rs	0.00%	5 Missing ⚠️
editoast/src/views/scenario.rs	0.00%	5 Missing ⚠️
editoast/src/views/scenario/macro_nodes.rs	0.00%	5 Missing ⚠️
editoast/src/views/study.rs	0.00%	5 Missing ⚠️
... and 24 more

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #10191      +/-   ##
==========================================
- Coverage   79.94%   79.93%   -0.01%     
==========================================
  Files        1057     1057              
  Lines      106302   106302              
  Branches      724      724              
==========================================
- Hits        84982    84972      -10     
- Misses      21278    21288      +10     
  Partials       42       42              

Flag	Coverage Δ
editoast	73.90% <0.00%> (-0.04%)	⬇️
front	89.19% <ø> (ø)
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.50% <ø> (ø)
tests	87.00% <ø> (ø)

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[leovalais]

Your commit message is too long: it must be <= 72 characters

[clarani]

LGTM ✅