Merge remote-tracking branch 'puppetlabs/6.x' into main

* puppetlabs/6.x:
  (maint) Retrieve only stdout for `puppet facts diff`
  (packaging) Updating manpage file for 6.x
  (packaging) Updating the puppet.pot file
  (PUP-10985) Output facts existing only in Facter 4 via `diff` action

# Conflicts:
#	lib/puppet/face/facts.rb
#	lib/puppet/util/fact_dif.rb
#	locales/puppet.pot
#	man/man8/puppet-facts.8
#	spec/unit/application/facts_spec.rb

Author: mihaibuzgau