Merge givaro/fflas_ffpack/linbox detection into one spkg-configure.m4

[mkoeppe]

These three need to have matching versions.

Currently our SPKGs are stuck at a set of old versions (see #32959), and we reject a matching set of current versions because individually they would not fit with our SPKGs.

CC: @dimpase @orlitzky @antonio-rojas

Component: packages: standard

Issue created by migration from https://trac.sagemath.org/ticket/34359