/usr/share/puppet/modules.available/puppetlabs-apt/manifests/ is in puppet-module-puppetlabs-apt 2.3.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/puppet/modules.available/puppetlabs-apt/manifests/backports.pp
/usr/share/puppet/modules.available/puppetlabs-apt/manifests/conf.pp
/usr/share/puppet/modules.available/puppetlabs-apt/manifests/init.pp
/usr/share/puppet/modules.available/puppetlabs-apt/manifests/key.pp
/usr/share/puppet/modules.available/puppetlabs-apt/manifests/params.pp
/usr/share/puppet/modules.available/puppetlabs-apt/manifests/pin.pp
/usr/share/puppet/modules.available/puppetlabs-apt/manifests/ppa.pp
/usr/share/puppet/modules.available/puppetlabs-apt/manifests/setting.pp
/usr/share/puppet/modules.available/puppetlabs-apt/manifests/source.pp
/usr/share/puppet/modules.available/puppetlabs-apt/manifests/update.pp