Add support for via coordinates in accesses and egresses

[optionsome]

Summary

Previously via visit locations had to be between transit legs. This pr allows them to be also in accesses or egresses.

Built on top of #7105

Issue

Relates to #4887

Unit tests

TODO

Documentation

Not needed

Changelog

From title

[codecov]

Codecov Report

❌ Patch coverage is 31.23596% with 306 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.94%. Comparing base (9afdb15) to head (8ca066a).
⚠️ Report is 4 commits behind head on dev-2.x.

Files with missing lines	Patch %	Lines
...oradapter/router/street/ViaAccessEgressRouter.java	0.00%	136 Missing ⚠️
...oradapter/router/street/ViaDirectStreetRouter.java	0.00%	115 Missing ⚠️
.../opentripplanner/routing/impl/GraphPathFinder.java	54.54%	8 Missing and 2 partials ⚠️
...r/routing/algorithm/mapping/ItinerariesHelper.java	12.50%	7 Missing ⚠️
...aptoradapter/router/street/DirectStreetRouter.java	80.00%	3 Missing and 3 partials ⚠️
...entripplanner/apis/gtfs/datafetchers/StopImpl.java	0.00%	4 Missing ⚠️
...src/main/java/org/opentripplanner/astar/AStar.java	0.00%	4 Missing ⚠️
...apter/router/street/AccessEgressRouterFactory.java	25.00%	2 Missing and 1 partial ⚠️
...pentripplanner/routing/graphfinder/NearbyStop.java	78.57%	2 Missing and 1 partial ⚠️
...rg/opentripplanner/visualizer/GraphVisualizer.java	0.00%	3 Missing ⚠️
... and 11 more

Additional details and impacted files

@@              Coverage Diff              @@
##             dev-2.x    #7239      +/-   ##
=============================================
- Coverage      72.14%   71.94%   -0.21%     
- Complexity     21086    21102      +16     
=============================================
  Files           2297     2303       +6     
  Lines          85223    85504     +281     
  Branches        8487     8503      +16     
=============================================
+ Hits           61488    61518      +30     
- Misses         20752    21003     +251     
  Partials        2983     2983              

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