Move integration and volume to Polyhedron_base7 #33583
Description
Part of #32651.
We also move cdd_Vrepresentation and cdd_Hrepresentation to Polyhedron_base0.
CC: @mkoeppe
Component: geometry
Author: Jonathan Kliem
Branch/Commit: f3c68a5
Reviewer: Matthias Koeppe
Issue created by migration from https://trac.sagemath.org/ticket/33583