Expand our Ruby cleanup to slim our Omnibus installs further
Expand our Ruby cleanup to slim our Omnibus installs further

Simplifies the existing logic, but also includes cleanup of the bundler
caches. This will remove ohai and chefstyle caches in the chef/chef
omnibus project which drops our install by 2.7 megs. This also includes
logic we shipped in Workstation / DK to remove more markdown and txt
files from gems, which speeds up installs on Windows and reduces overall
package size.

Signed-off-by: Tim Smith <764ef62106582a09ed09dfa0b6bff7c05fd7d1e4@chef.io>

higanworks/omnibus-software,mattray/omnibus-software,higanworks/omnibus-software,aerobase/omnibus-software,chef/omnibus-software,chef/omnibus-software,chef/omnibus-software,chef/omnibus-software,aerobase/omnibus-software,chef/omnibus-software,mattray/omnibus-software,aerobase/omnibus-software,higanworks/omnibus-software,mattray/omnibus-software,mattray/omnibus-software,aerobase/omnibus-software,aerobase/omnibus-software,higanworks/omnibus-software,mattray/omnibus-software,chef/omnibus-software