Outsource some functions in bit_vector_operations.cc

[kliem]

We simplify obtaining the inclusion maximal faces in the function
get_next_level by outsourcing to new function is_contained_in_one.

In addition we implement contains_one for #30040.

This ticket merges cleanly with #30435.

Component: geometry

Keywords: code duplication, combinatorial polyhedron

Author: Jonathan Kliem

Branch/Commit: 5311cdf

Reviewer: Travis Scrimshaw, Samuel Lelièvre

Issue created by migration from https://trac.sagemath.org/ticket/30458

[kliem]

Branch: u/gh-kliem/outsource_inclusion_maximal

[kliem]

New commits:

20a39b6

outsource inclusion maximal

[kliem]

Commit: 20a39b6

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

b672fca

removed redundant function

[sagetrac-git]

Changed commit from 20a39b6 to b672fca

[tscrim]

Reviewer: Travis Scrimshaw

[tscrim]

comment:3

LGTM.

[kliem]

comment:4

Thank you.