Incrementally generate raptor transfers from constrained transfers for new pattern

[slvlirnoff]

Summary

This aims at incrementally updating the generated raptor transfers for the transit layer from the constrained transfers. It keeps track of the last RoutingPattern index and only generate transfers that are alighting or boarding newly created patterns.

Issue

Closes #6190

[codecov]

Codecov Report

Attention: Patch coverage is 65.71429% with 12 lines in your changes missing coverage. Please review.

Project coverage is 69.90%. Comparing base (cee960f) to head (dd394a5).

Files with missing lines	Patch %	Lines
...it/constrainedtransfer/TransferIndexGenerator.java	65.71%	8 Missing and 4 partials ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             dev-2.x    #6191      +/-   ##
=============================================
- Coverage      69.90%   69.90%   -0.01%     
- Complexity     17723    17725       +2     
=============================================
  Files           1998     1998              
  Lines          75443    75468      +25     
  Branches        7718     7727       +9     
=============================================
+ Hits           52740    52754      +14     
- Misses         20025    20031       +6     
- Partials        2678     2683       +5     

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[slvlirnoff]

In our deployment (40k pattern, 60k constrained transfer) updating the transit layer goes from systematically ~6s to ~10-20ms in average and a up to a few hundreds ms when new pattern are created.