editoast: add roles check to views::sprites

[hamz2a]

Part of #8446

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 77.77778% with 4 lines in your changes missing coverage. Please review.

Project coverage is 36.97%. Comparing base (819e1e8) to head (c9c16c8).
Report is 23 commits behind head on dev.

Files	Patch %	Lines
editoast/src/views/sprites.rs	77.77%	4 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff            @@
##                dev    #8510   +/-   ##
=========================================
  Coverage     36.96%   36.97%           
  Complexity     2168     2168           
=========================================
  Files          1271     1271           
  Lines        118097   118114   +17     
  Branches       3174     3174           
=========================================
+ Hits          43656    43670   +14     
- Misses        72566    72569    +3     
  Partials       1875     1875           

Flag	Coverage Δ
core	74.90% <ø> (ø)
editoast	66.16% <77.77%> (+<0.01%)	⬆️
front	15.95% <ø> (ø)
gateway	2.20% <ø> (ø)
osrdyne	2.71% <ø> (ø)
railjson_generator	87.49% <ø> (ø)
tests	72.91% <ø> (ø)

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