Changes to POST /v3/usersNonbusinessGroups

added the new EndBeforeStart enum value to the errors/items/error/anyOf[subschema #3: End before start error]/type response property for the response status 422

added the new ResourceNotFound enum value to the errors/items/error/anyOf[subschema #1: Resource not found error]/type response property for the response status 422

added the new UsersNonbusinessGroupsCollision enum value to the errors/items/error/anyOf[subschema #2: Users nonbusiness groups collision error]/type response property for the response status 422

removed ResourceNotFoundError from the errors/items/error response property anyOf list for the response status 422