Obtain singular.hlp location via libsingular_resources #32254
Description
We expose one additional libsingular function in sage.libs.singular.singular:
sage: from sage.libs.singular.singular import get_resource
sage: get_resource('i')
'/Users/mkoeppe/s/sage/sage-rebasing/worktree-gcc11/local/bin/../share/info/singular.hlp'
CC: @kiwifb @orlitzky @antonio-rojas @dimpase
Component: interfaces
Author: Matthias Koeppe
Branch/Commit: 591922d
Reviewer: Antonio Rojas
Issue created by migration from https://trac.sagemath.org/ticket/32254