drop support for versions < 1.15.0 #471

Job	Run time
Puppet / Static validations	20s
Puppet / 8 (Ruby 3.2)	3m 55s
Puppet / Puppet 8 - Debian 10	3m 29s
Puppet / Puppet 7 - Debian 10	3m 8s
Puppet / 7 (Ruby 2.7)	3m 56s
Puppet / Puppet 8 - Debian 11	3m 12s
Puppet / Puppet 7 - Debian 11	2m 59s
Puppet / Puppet 8 - Rocky 8	1m 51s
Puppet / Puppet 7 - Rocky 8	1m 57s
Puppet / Puppet 8 - Rocky 9	2m 6s
Puppet / Puppet 7 - Rocky 9	1m 53s
Puppet / Puppet 8 - AlmaLinux 8	2m 8s
Puppet / Puppet 7 - AlmaLinux 8	2m 1s
Puppet / Puppet 8 - AlmaLinux 9	1m 47s
Puppet / Puppet 7 - AlmaLinux 9	1m 50s
Puppet / Puppet 8 - CentOS 7	3m 8s
Puppet / Puppet 7 - CentOS 7	2m 20s
Puppet / Puppet 8 - CentOS 8	2m 22s
Puppet / Puppet 7 - CentOS 8	2m 26s
Puppet / Puppet 8 - CentOS 9	2m 20s
Puppet / Puppet 7 - CentOS 9	2m 13s
Puppet / Distro Puppet - Archlinux rolling	3m 38s
Puppet / Puppet 8 - Ubuntu 20.04	3m 31s
Puppet / Puppet 7 - Ubuntu 20.04	3m 37s
Puppet / Puppet 8 - Ubuntu 22.04	3m 25s
Puppet / Puppet 7 - Ubuntu 22.04	3m 23s
Puppet / Test suite	1s
	1h 8m 56s

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