Some roles are missing the _deleter counterpart

[mmanes]

Some roles are missing the _deleter counterpart.

Description

The email_template_manager and entity_manager roles allow full access to their object types. This is inconsistent with the behavior with the other role types where there is an explicit *_deleter role.

Consider splitting out the delete permission into a separate role for consistency.

[mooreds]

The documentation portion of this issue is addressed here: FusionAuth/fusionauth-site#3448

There were quite a few manager roles with delete privileges.

Still agree that we should split out the roles to include a _deleter role for every entity.