Make org ownership explicit on create

[lyondhill]

Proposal:
Org creation should not use the auth system to determine ownership

Current behavior:
When a organization create request is made we try pulling the auth.UserID from the context. If we do have that piece of information it will create a relationship between the user and the organization. This implicit assumption means it is possible to create an organization that has now owners and thus is unusable.

Desired behavior:
We should make this connection explicit instead of implicit.

[lyondhill]

I was thinking we could follow the pattern where on create we pass a "createOrg" struct similar to how we do in some other places CreateTask(ctx context.Context, t TaskCreate) (*Task, error) then we could add the "ownerID" to that object and not interfere with the org.