Make public_key.pkcs7.pem a RSA public key instead of a X509 certificate #126

Job	Run time
Ruby 2.7 - Puppet ~> 7.24	1m 52s
Ruby 3.0 - Puppet ~> 7.24	1m 39s
Ruby 3.1 - Puppet ~> 8.0	1m 37s
Ruby 3.1 - Puppet ~> 7.24	1m 39s
Ruby 3.1 - Puppet https://github.com/puppetlabs/puppet.git#main	1m 47s
Ruby 3.2 - Puppet ~> 8.0	1m 38s
Ruby 3.2 - Puppet ~> 7.24	1m 43s
Ruby 3.2 - Puppet https://github.com/puppetlabs/puppet.git#main	1m 41s
Test suite	1s
	13m 37s

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