Allow reports and labels to exist without a user

[grantfitzsimmons]

When #256 is fixed, we should remove the need to be the owner to edit a query and report

[specifysoftware]

This issue has been mentioned on Specify Community Forum. There might be relevant details there:

https://discourse.specifysoftware.org/t/reports-and-labels-depend-on-one-users/997/3