Add Puppet 8 support #773

Job	Run time
Puppet / Static validations	2m 39s
Puppet / 8 (Ruby 3.2)	2m 50s
Puppet / Puppet 8 - CentOS 7	3m 40s
Puppet / 7 (Ruby 2.7)	2m 53s
Puppet / Puppet 7 - CentOS 7	1m 14s
Puppet / Puppet 8 - CentOS 8	1m 38s
Puppet / Puppet 7 - CentOS 8	2m 34s
Puppet / Puppet 8 - CentOS 9	2m 3s
Puppet / Puppet 7 - CentOS 9	1m 13s
Puppet / Puppet 8 - Debian 10	1m 26s
Puppet / Puppet 7 - Debian 10	1m 21s
Puppet / Puppet 8 - Debian 11	1m 23s
Puppet / Puppet 7 - Debian 11	1m 22s
Puppet / Puppet 8 - Ubuntu 20.04	1m 34s
Puppet / Puppet 7 - Ubuntu 20.04	2m 8s
Puppet / Distro Puppet - Archlinux rolling	1m 59s
Puppet / Test suite	1s
	31m 58s

Provide feedback