cubicweb #3344410 transformed_rset/filtered_rset/sorted_rset get broken description [validation pending]

These methods rely on passing an empty description and being able to fill it afterwards. New ResultSet.__init__ in 3.17.10 makes that impossible.

prioritynormal
typebug
done in3.17.11
load0.500
load left0.000
closed by#c6f54ed6b60a [rset] Fix regression with rset copying (closes #3344410)
patch[rset] Fix regression with rset copying (closes #3344410) [folded]