Add support to encrypt with an RSA public key #167

Job	Run time
Ruby 2.7 - Puppet ~> 7.24	1m 19s
Ruby 3.0 - Puppet ~> 7.24	1m 7s
Ruby 3.1 - Puppet ~> 8.0	1m 20s
Ruby 3.1 - Puppet ~> 7.24	1m 13s
Ruby 3.1 - Puppet https://github.com/puppetlabs/puppet.git#main	1m 25s
rubocop	22s
Ruby 3.2 - Puppet ~> 8.0	1m 13s
Ruby 3.2 - Puppet ~> 7.24	1m 8s
Ruby 3.2 - Puppet https://github.com/puppetlabs/puppet.git#main	1m 14s
Ruby jruby-9.4 - Puppet ~> 8.0	9m 42s
Ruby jruby-9.4 - Puppet ~> 7.24	9m 30s
Ruby jruby-9.4 - Puppet https://github.com/puppetlabs/puppet.git#main	10m 4s
Test suite	1s
	39m 38s

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