front: display duration time only for requested pathsteps

[SarahBellaha]

Closes #9981

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 81.43%. Comparing base (b09fc36) to head (5d98e7b).
Report is 10 commits behind head on dev.

Files with missing lines	Patch %	Lines
...cations/stdcm/utils/formatSimulationReportSheet.ts	0.00%	4 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #10264      +/-   ##
==========================================
- Coverage   81.44%   81.43%   -0.02%     
==========================================
  Files        1058     1058              
  Lines      104282   104286       +4     
  Branches      722      722              
==========================================
- Hits        84936    84923      -13     
- Misses      19305    19322      +17     
  Partials       41       41              

Flag	Coverage Δ
editoast	73.57% <ø> (-0.05%)	⬇️
front	89.18% <20.00%> (-0.01%)	⬇️
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.50% <ø> (ø)
tests	87.05% <ø> (ø)

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[Caracol3]

lgtm !

[SharglutDev]

Lgtm and tested :)