Allow fares V1 and V2 feeds in the same deployment

[leonardehrenfried]

Summary

It allows deployments to use fares v1 as well as v2.

During graph build we find out if a feed contains both then use v2, otherwise use v1. This means that feed A's v1 data can be combined with feed B's v2, even in the same itinerary.

Unit tests

Added.

Documentation

Javadoc.

Changelog

No, sandbox feature.

cc @miles-grant-ibigroup @fpurcell

[codecov]

Codecov Report

❌ Patch coverage is 86.36364% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.01%. Comparing base (1c8fdcb) to head (6733196).

Files with missing lines	Patch %	Lines
...pplanner/ext/fares/impl/gtfs/GtfsFaresService.java	80.00%	1 Missing and 1 partial ⚠️
...er/gtfs/mapping/GTFSToOtpTransitServiceMapper.java	87.50%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             dev-2.x    #6836   +/-   ##
==========================================
  Coverage      72.00%   72.01%           
- Complexity     19430    19431    +1     
==========================================
  Files           2099     2099           
  Lines          78730    78738    +8     
  Branches        7961     7962    +1     
==========================================
+ Hits           56692    56705   +13     
+ Misses         19233    19227    -6     
- Partials        2805     2806    +1     

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