tools: Add a script to switch between coreutils and rust-coreutils

These being essential packages, a script is needed to backup binaries used to do the upgrade.

Signed-off-by: Detlev Casanova detlev.casanova@collabora.com

requested review from @vignesh

requested review from @detlev and removed review request for @vignesh

@detlev It seems the previous MR was merged in a wrong branch during the branching period :) and now we have a lower version in v2023dev2. Is it okay to push this version in 2023dev2?

resolved all threads

merged