Foreman » Packaging

Fixes #27874 - Optimize tfm wrappers

This avoids a complex process tree and replaces the original process.
This saves memory and also makes ps auxf and similar commands much more
understandable.

Compare:

/bin/bash /usr/bin/tfm-rake -- console
     \_ scl enable tfm bash /tmp/tmp.4vH4dRd7aM
         \_ /bin/bash /var/tmp/scliO1x5z
             \_ bash /tmp/tmp.4vH4dRd7aM
                 \_ /opt/rh/rh-ruby25/root/usr/bin/ruby /opt/rh/rh-ruby25/root/usr/bin/rake -- console

With:

/opt/rh/rh-ruby25/root/usr/bin/ruby /opt/rh/rh-ruby25/root/usr/bin/rake console