Fix stop time fetching in added or replacement trips

[miklcct]

Summary

This fixes problems when reading stop times for added or replacement trips.

Issue

Fixes #6088
Fixes #6242

Unit tests

GraphQL Integration tests are added for one added trip and one replacement trip. This is the first time real-time updates can be integration tested.

Documentation

None needed

[codecov]

Codecov Report

Attention: Patch coverage is 73.68421% with 10 lines in your changes missing coverage. Please review.

Project coverage is 69.84%. Comparing base (ee53e50) to head (38c3a5a).
Report is 124 commits behind head on dev-2.x.

Files with missing lines	Patch %	Lines
...entripplanner/apis/gtfs/datafetchers/TripImpl.java	76.47%	5 Missing and 3 partials ⚠️
...java/org/opentripplanner/model/TripTimeOnDate.java	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             dev-2.x    #6245      +/-   ##
=============================================
- Coverage      69.91%   69.84%   -0.08%     
+ Complexity     17736    17698      -38     
=============================================
  Files           2006     2007       +1     
  Lines          75526    75655     +129     
  Branches        7730     7747      +17     
=============================================
+ Hits           52804    52839      +35     
- Misses         20036    20100      +64     
- Partials        2686     2716      +30     

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