maliput_viewer: Supports maliput_osm's maps.

[francocipollone]

🎉 New feature

Relies on https://github.com/maliput/delphyne/pull/855

Summary

Supports loading maliput_osm's maps. This is particularly useful for the creation of new osm.

Test it

Run maliput_viewer and load a osm file from the gui.

Checklist

• [x] Signed all commits for DCO
• [ ] Added tests
• [ ] Added example and/or tutorial
• [ ] Updated documentation (as needed)
• [ ] Updated migration guide (as needed)
• [ ] Consider updating Python bindings (if it affects the public API)

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[agalbachicar]

I think we should run CI again.