migration to remove ProjectQuery namespace for entity_type of Member

[toy]

Migration is needed after changes in #15983

[klaustopher]

Up until now there was no way to create a membership on a project query for real users out there, so that migration will not do anything for anybody outside of our little circle of developers rails runner "Member.where(entity_type: 'Queries::Projects::ProjectQuery').update_all(entity_type: 'ProjectQuery') for everybody who has created some should just do the job