Add Fares v2 to GraphQL API

[leonardehrenfried]

Summary

This one adds the new FaresV2 entities to the GraphQL API.

I would like to talk about the schema in the dev meeting if it is the right way to think about fares.

Closes #4935

Unit tests

Added.

[codecov]

Codecov Report

Patch coverage: 89.21% and project coverage change: +0.11 🎉

Comparison is base (e7b48eb) 64.46% compared to head (b19f553) 64.58%.

Additional details and impacted files

@@              Coverage Diff              @@
##             dev-2.x    #4917      +/-   ##
=============================================
+ Coverage      64.46%   64.58%   +0.11%     
- Complexity     13896    13937      +41     
=============================================
  Files           1721     1725       +4     
  Lines          67229    67355     +126     
  Branches        7214     7218       +4     
=============================================
+ Hits           43339    43499     +160     
+ Misses         21466    21435      -31     
+ Partials        2424     2421       -3     

Impacted Files	Coverage Δ
...nner/ext/fares/impl/AddingMultipleFareService.java	0.00% <ø> (-85.19%)	⬇️
...r/ext/fares/impl/CombinedInterlinedTransitLeg.java	52.00% <0.00%> (-4.53%)	⬇️
...nner/ext/fares/impl/DefaultFareServiceFactory.java	86.04% <ø> (ø)
...entripplanner/ext/fares/impl/GtfsFaresService.java	85.71% <ø> (ø)
...tripplanner/ext/fares/impl/GtfsFaresV2Service.java	95.96% <0.00%> (ø)
...planner/ext/fares/impl/NoopFareServiceFactory.java	0.00% <ø> (ø)
...ipplanner/ext/fares/impl/SFBayFareServiceImpl.java	0.00% <ø> (ø)
.../fares/impl/TimeBasedVehicleRentalFareService.java	0.00% <ø> (ø)
...opentripplanner/ext/fares/model/FareRulesData.java	100.00% <ø> (ø)
...g/opentripplanner/ext/flex/FlexibleTransitLeg.java	40.00% <0.00%> (-1.94%)	⬇️
... and 37 more

... and 7 files with indirect coverage changes

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[leonardehrenfried]

@vesameskanen has already approved this twice so I'm going wait to re-request a review until @t2gran has finished his review.

[t2gran]

I am done with my review now. I have not reviewed the classes inside the Sandbox and only done a technical review on the rest. I do not now the GTFS Fares spec so my review on the business logic is at best superficial.

[leonardehrenfried]

We discussed this in the dev meeting today and I've renamed validityDuration to validity.