editoast: speed up layer generation

[flomonster]

Uses track section layer avoiding using st_transform.

Benchmark

	Old Version	New version
Track section	3.99s	4.43s
Speed section	160.21s	60.99s
Signal	3.17s	3.43s
Switch	2.13s	0.52s
Buffer stop	0.35s	0.20s
Catenary	10.02s	3.96s
Detector	11.11s	3.17s
Operational point	4.53s	1.42s
Track link	1.25s	0.29s
Lpv panel	5.08s	2.21s
Dead section	1.22s	0.63s
TOTAL	203s	81.2s

[codecov]

Codecov Report

Merging #4607 (2697454) into dev (84556c5) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                dev    #4607      +/-   ##
============================================
- Coverage     19.91%   19.91%   -0.01%     
  Complexity     2316     2316              
============================================
  Files           865      865              
  Lines         88144    88144              
  Branches       2277     2277              
============================================
- Hits          17553    17552       -1     
- Misses        69335    69336       +1     
  Partials       1256     1256              

Flag	Coverage Δ
editoast	61.22% <ø> (-0.03%)	⬇️

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see 1 file with indirect coverage changes

[leovalais]

Shouldn't the search engine responses be updated as well?

https://github.com/osrd-project/osrd/blob/84556c5528d0a7604dc7c5de156dc83672e1b398/editoast/search.yml#L22-L23

(The geometry 4326 might be wrong as well...)

[flomonster]

Shouldn't the search engine responses be updated as well?

https://github.com/osrd-project/osrd/blob/84556c5528d0a7604dc7c5de156dc83672e1b398/editoast/search.yml#L22-L23

(The geometry 4326 might be wrong as well...)

This part is correct, the geometry stored in layers uses 3857 SRID (I haven't changed it). So we need to transform it to 4326 to match the required projection for geojson.

[Tguisnet]

LGTM

[leovalais]

LGTM