Support proxy when downloading remote certificates #74

Job	Run time
Puppet / Static validations	14s
Puppet / 8 (Ruby 3.2)	29s
Puppet / Puppet 8 - CentOS 9	1m 22s
Puppet / 7 (Ruby 2.7)	43s
Puppet / Puppet 7 - CentOS 9	1m 11s
Puppet / Puppet 8 - Rocky 8	1m 13s
Puppet / Puppet 7 - Rocky 8	1m 22s
Puppet / Puppet 8 - Rocky 9	1m 15s
Puppet / Puppet 7 - Rocky 9	1m 25s
Puppet / Puppet 8 - AlmaLinux 8	1m 16s
Puppet / Puppet 7 - AlmaLinux 8	1m 16s
Puppet / Puppet 8 - AlmaLinux 9	1m 3s
Puppet / Puppet 7 - AlmaLinux 9	1m 4s
Puppet / Puppet 8 - Debian 11	1m 32s
Puppet / Puppet 7 - Debian 11	1m 26s
Puppet / Puppet 8 - Debian 12	1m 53s
Puppet / Puppet 7 - Debian 12	1m 53s
Puppet / Puppet 8 - Ubuntu 20.04	2m 8s
Puppet / Puppet 7 - Ubuntu 20.04	3m 38s
Puppet / Puppet 8 - Ubuntu 22.04	2m 58s
Puppet / Puppet 7 - Ubuntu 22.04	1m 21s
Puppet / Distro Puppet - Archlinux rolling	1m 21s
Puppet / Test suite	1s
	32m 4s

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