[adapt_cm4] All polyhedral formfactors now constructed by libff; files merged into Polyhedra.h|cpp ()

Merging branch 'adapt_cm4'  into 'main'.

See merge request !1188

Merging branch 'adaptff8'  into 'main'.

See merge request !1187

Merging branch 'adaptff7'  into 'main'.

See merge request !1186

Merging branch 'multiqtest'  into 'main'.

See merge request !1185

pass functions q->ff instead of q's or ff's