Move rational methods of the backend normaliz to the `_QQ` class

[jplab]

Now that the normaliz backend allows algebraic values, it makes sense to move the rational polyhedral methods to the rational base class.

CC: @jplab @mkoeppe @videlec @fchapoton

Component: geometry

Keywords: polytopes, normaliz, days100

Author: Jean-Philippe Labbé

Branch/Commit: 436dbc3

Reviewer: Frédéric Chapoton

Issue created by migration from https://trac.sagemath.org/ticket/28240

[jplab]

comment:1

The Ehrhart polynomial business is going to be taken care of in #18957.

[fchapoton]

Reviewer: Frédéric Chapoton

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1 and set ticket back to needs_review. New commits:

7b4318d

pyflakes

[sagetrac-git]

Changed commit from 436dbc3 to 7b4318d

[jplab]

comment:4

OOps!!! My bad! Wrong branch!

[sagetrac-git]

Changed commit from 7b4318d to 436dbc3