It is quite annoying to see codelens reference between the field and field's attributes. It requires to add a lot of additional spaces around to make everything readable. Is it possible to display CodeLens reference above the attributes?
No, this is currently not possible.
If you'd like to see this, I suggest you give the product team a shout-out on the Visual Studio UserVoice and post back the link as a comment to this answer. I'd suggest not to move the code lens information, but to suggest the location to be made configurable :).
Though I can't disclose any details, I've seen your feedback before and I know it has been considered, but rejected.