sage.geometry.polyhedron.backend_cdd: Go through sage.features for _cdd_executable

[mkoeppe]

This is so that the Sage library becomes fully functional even when not being run from within sage-env (which sets PATH).

To test (when cddlib is not present in the system but installed as SPKG):

venv/bin/python3 -c 'from sage.all import *; print(Polyhedron(vertices=[[1.123456789012345, 2.123456789012345]], base_ring=RDF))'

Depends on #31296

CC: @kliem @saraedum

Component: refactoring

Author: Matthias Koeppe

Branch/Commit: 14d3a65

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/32645

[mkoeppe]

Dependencies: #31296

[mkoeppe]

Branch: u/mkoeppe/sage_geometry_polyhedron_backend_cdd__go_through_sage_features_for__cdd_executable

[mkoeppe]

Last 10 new commits:

a93e9af	src/sage/features/__init__.py: Simplify Executable.absolute_path
5b25c1d	sage.features: Refactor StaticFile, Executable through a new base class FileFeature
6c35717	sage.features.FileFeature: Replace method absolute_path by absolute_filename, with deprecation
9266709	Merge #31292
a4d0ed6	sage.interfaces.four_ti_2: Use Executable.absolute_filename
4252ea3	sage.sandpiles.sandpile: Use Executable.absolute_filename() when interfacing 4ti2
17b9fde	sage.interfaces.latte: Use Executable.absolute_filename
777e643	Merge #31296
bbb6c1f	sage.features.cddlib: New
14d3a65	sage.geometry.polyhedron.backend_cdd: Use CddExecutable(...).absolute_filename()

[mkoeppe]

Commit: 14d3a65

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1 +1,8 @@
+This is so that the Sage library becomes fully functional even when not being run from within sage-env (which sets PATH).
 
+To test (when cddlib is not present in the system but installed as SPKG):
+
+```
+venv/bin/python3 -c 'from sage.all import *; print(Polyhedron(vertices=[[1.123456789012345, 2.123456789012345]], base_ring=RDF))'
+```
+

[tscrim]

comment:5

LGTM.

[tscrim]

Reviewer: Travis Scrimshaw

[mkoeppe]

comment:6

Thanks!

[vbraun]

Changed branch from u/mkoeppe/sage_geometry_polyhedron_backend_cdd__go_through_sage_features_for__cdd_executable to 14d3a65