a minimum working on standard distros setup.

Note that R does not have a working uninstall, so one needs to manually uninstall by

rm -rf $SAGE_LOCAL/lib/R
rm $SAGE_LOCAL/bin/R*

followed by

./bootstrap
./configure
./sage -f rpy2
make build

and then test. (Or, of course start from make distclean)

Depends on #27870

CC: @sagetrac-tmonteil @kiwifb @isuruf @EmmanuelCharpentier @embray

Component: build: configure

Author: Dima Pasechnik

Branch/Commit: 1f4a7e1

Reviewer: Emmanuel Charpentier

Issue created by migration from https://trac.sagemath.org/ticket/28884