Add domain group type

Problem/Motivation

Ability to make a list of just domain groups when there might be other group types.
Remove the ability to add domain from all group types if some are not intended to be used for domain.
Change path access to tabs.
Use for restricting views lists.

Proposed resolution

https://github.com/localgovdrupal/localgov_microsites_group/issues/22 added the code to give domain groups classes.
An additional (third party) setting on the group type could be used to apply this to appropriate bundles.
This can then be used anywhere required to check a group, or list the group types with the third party setting.

Remaining tasks

Add third party setting, Add toggle to group type form. Restrict if changing configuration content already exists

User interface changes

New toggle on the group type

API changes

New group entity class.