Geos that arn't able to be referenced still appear in the entity browser

Problem/Motivation

https://github.com/localgovdrupal/localgov_geo/issues/57

We have set up a custom geo type parking zone for a special content type.
Yet this type is showing up in the geo entity browser for directory venue, even though only address geos can be referenced. Its also possible to select them, but not save the directory venue as it then gives an error that location cannot be referenced.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes