#28095 adds configure --enable-SPKG.

As a follow-up, using this new interface we reimplement sage -i for optional/experimental packages, falling back to direct invocation of make for all other packages.

CC: @dimpase @embray @jhpalmieri

Component: build

Author: Matthias Koeppe

Branch/Commit: 3417f43

Reviewer: John Palmieri

Issue created by migration from https://trac.sagemath.org/ticket/29113