Support for conditional access tags

[danpat]

With #3841, we gained support for conditional turn restrictions.

We should also implement conditional access:conditional tags, example:

https://www.openstreetmap.org/way/242346384

[daniel-j-h]

@karenzshea can you spec out the tasks that need to be done here?

[karenzshea]

We can expand the meaning of our existing conditional restriction flags to include access=conditional tags on non-relation features.

• During way parsing in extraction, save ways tagged with access:conditional to disk like we do with restrictions with data node ids, is_only and opening hours.
  • this will probably require a new osrm file, or we'll need to figure out how to make them share the .osrm.restrictions file
  • we can maybe genericize the serializer for both restricted turns and ways
• In the update handler (shared by contraction/customization) parse way restrictions and apply them if the condition is valid
• Tests

A lot of the hard work is already in place, like condition validation and time zone handling, so this shouldn't be as complicated of a lift as conditional turns.

[xuruiray]

Do we support conditional access now?

[joaommartins]

Do we support conditional access now?

Still not supported, tested today.

This feature is referenced by:
#4300
#5801
#6706