refactor openscenario validator package

[HansRobo]

Description

Abstract

Modified openscenario_validator so that it can be used as a header-only library.

Background

N/A

Details

N/A

References

regression test: https://github.com/tier4/sim_evaluation_tools/issues/282

Destructive Changes

OpenSCENARIOValidator class users will be affected by this change.
(But, the class is not included in the interfaces that should be maintained, the version increment is at the patch level.)

Known Limitations

N/A

[github-actions]

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