Speedup stdcm editoast endpoint 🚀

[flomonster]

close #10452

What si done (review commits individual):

1. Spawn tasks to dispatch cpu charge
2. Reduce train batch size
3. Avoid useless psql queries
4. Optimize a postgresql queries. Limit the number of elements in the response. Moving a filter from rust to postgres. (check perf here: https://explain.dalibo.com/plan/e7d4427b7a8ea7d5)

Local benchmark

	Before	After
Without cache	106s	108s
With cache	9.64s	3.15s

Dev benchmark

	Before (Compression)	After (No-Compression)	After (Compression)
Without cache	90s	111s	109s
With cache	17s	12.7s	8.3s

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 95.65217% with 2 lines in your changes missing coverage. Please review.

Project coverage is 81.91%. Comparing base (14fa21b) to head (6d9e5f8).
Report is 5 commits behind head on dev.

Files with missing lines	Patch %	Lines
editoast/src/models/timetable.rs	94.11%	1 Missing ⚠️
editoast/src/views/path/path_item_cache.rs	75.00%	1 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff           @@
##              dev   #10692   +/-   ##
=======================================
  Coverage   81.90%   81.91%           
=======================================
  Files        1079     1079           
  Lines      107473   107471    -2     
  Branches      734      734           
=======================================
+ Hits        88024    88032    +8     
+ Misses      19409    19399   -10     
  Partials       40       40           

Flag	Coverage Δ
editoast	74.32% <95.65%> (+0.02%)	⬆️
front	89.41% <ø> (ø)
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.50% <ø> (ø)
tests	88.14% <ø> (ø)

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[woshilapin]

Nice improvement of performance 🚀 Only minor comments.