(PUP-3163) Create and manage the mode of $reportsdir

For redhat and debian, we create and manage a $statedir with ownership
set to puppet:puppet. Unfortuntely, we also create a $reportsdir that is
owned by root. This means that other applications, even those in the
puppet group, could not write to this directory. This commits adds the
$reportsdir to both debian and redhat packaging to ensure it is created
with the correct permissions (just at the $statedir is), to ensure a
more consistent experience for users of our packages.