Remove old trip pattern cache implementation

[leonardehrenfried]

Summary

This is part 2 of combining the two trip pattern caches started in #7219. It removes the old GTFS implementation, renames the SIRI one and moves it to a shared package.

Documentation

Javadoc updated.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.16%. Comparing base (5afceb5) to head (94ebdb8).

Additional details and impacted files

@@              Coverage Diff              @@
##             dev-2.x    #7248      +/-   ##
=============================================
+ Coverage      72.13%   72.16%   +0.02%     
- Complexity     21084    21087       +3     
=============================================
  Files           2297     2296       -1     
  Lines          85233    85208      -25     
  Branches        8489     8486       -3     
=============================================
+ Hits           61486    61488       +2     
+ Misses         20767    20742      -25     
+ Partials        2980     2978       -2     

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