Workspace owner should be displayed in PDF or CSV exports

Description: Adding the owner of a workspace to the PDF or CSV export.

Why it is important: It is important to verify a workspace. There are a lot of workspaces that are created and owned by admins. If someone copies the workspace and changes its content but not the title/headline and sends the report to a third person, the third person does not know if this workspace is verified by admins or not.

How shall it work: The owner/creator of the workspace should be written down in the exported PDF, like the title or the date of creation for example.

Current behavior: At the moment, there is no creator name displayed in the exported workspaces and if a verified and a changed version of the verified have the same title still, a third person does not know if the displayed reports are kind of verified or not.