front: rewrite kp label layer

[clarani]

closes #5797

The problem was that if a source is of type geojson, it can not receive a source-layer.

In this PR I:

• renamed and modified a bit the configKPLabelLayer function to harmonize it with the other layers + remove the source layer if not needed
• in SpeedSectionEditionLayers, modified the code to have always the 2 sources
• renamed the SNCF_PSL and SNCF_PSL_SIGNS files

[codecov]

Codecov Report

Attention: 81 lines in your changes are missing coverage. Please review.

Comparison is base (b6ead5b) 19.70% compared to head (09ff38e) 19.70%.
Report is 19 commits behind head on dev.

Files	Patch %	Lines
...Edition/speedSection/SpeedSectionEditionLayers.tsx	0.00%	33 Missing ⚠️
front/src/common/Map/Layers/KPLabel.ts	0.00%	20 Missing ⚠️
...src/common/Map/Layers/extensions/SNCF/PSLSigns.tsx	0.00%	9 Missing ⚠️
front/src/common/Map/Layers/GeoJSONs.tsx	0.00%	7 Missing ⚠️
front/src/common/Map/Layers/Signals.tsx	0.00%	4 Missing ⚠️
front/src/common/Map/Layers/OperationalPoints.tsx	0.00%	3 Missing ⚠️
front/src/applications/referenceMap/Map.tsx	0.00%	1 Missing ⚠️
...ront/src/common/Map/Layers/extensions/SNCF/PSL.tsx	0.00%	1 Missing ⚠️
...mulationResult/components/SimulationResultsMap.tsx	0.00%	1 Missing ⚠️
...ainschedule/components/ImportTrainSchedule/Map.tsx	0.00%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@             Coverage Diff              @@
##                dev    #5876      +/-   ##
============================================
- Coverage     19.70%   19.70%   -0.01%     
  Complexity     2345     2345              
============================================
  Files           910      910              
  Lines        108075   108137      +62     
  Branches       2634     2634              
============================================
+ Hits          21299    21310      +11     
- Misses        85216    85267      +51     
  Partials       1560     1560              

Flag	Coverage Δ
front	8.64% <0.00%> (+<0.01%)	⬆️

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[SharglutDev]

Thank you for this fix ! Lgtm and tested :) Left just one suggestion

[SarahBellaha]

Tested, LGTM. Good job ! 💪

[Yohh]

💪