Split schema validation actions workflow into two jobs

[optionsome]

Summary

Splits schema validation actions workflow into two jobs so we always see the validation results from both validation runs.

Issue

No issue

Unit tests

None

Documentation

None

Changelog

Skipped

[optionsome]

https://github.com/opentripplanner/OpenTripPlanner/actions/runs/14405863905/job/40402118990 shows an example.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.04%. Comparing base (95e9d70) to head (ed1b770).

Additional details and impacted files

@@            Coverage Diff             @@
##             dev-2.x    #6612   +/-   ##
==========================================
  Coverage      71.03%   71.04%           
- Complexity     18296    18299    +3     
==========================================
  Files           2005     2005           
  Lines          75849    75849           
  Branches        7779     7779           
==========================================
+ Hits           53882    53884    +2     
  Misses         19222    19222           
+ Partials        2745     2743    -2     

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