Use voluptuous for Zone

[fabaff]

Description:
Migration of the configuration check to voluptuous.

Related issue (if applicable): fixes 127528299

Example entry for configuration.yaml (if applicable):

zone:
  name: School
  latitude: 32.8773367
  longitude: -117.2494053
  radius: 250
  icon: mdi:school

zone 2:
  name: Work
  latitude: 32.8753367
  longitude: -117.2474053

It would be nice if somebody could take a look at the changes and run a quick test. Thanks.

[dcrypt3d]

Something not right with this. Getting an "expected a dictionary for dictionary value" error.

[balloob]

Fixed it in #3413