pyOpenSSL requirement pins us to an unecessarily-old cryptography module

[ggainey]

Currently we have require PyOpenSSL<23.0 in requirements.txt. This version requires cryptography>=38.0.0,<39, which means we are missing a CVE that cryptography addresses in 39.0.1.

pulpcore now has widened its crypto-requirement to cryptography>=38.0.1,<41.0.5. This means we can widen our PyOpenSSL requirement to <24.0, which allows the installation to choose cryptography 41.0 and satisfy core and pulp-certguard.

[ggainey]

NOTE: this is a related, but not the same, issue as raised in #212, which was resolved by loosening pulpcore's restrictions.

It could be also be addressed by going to cryptography directly, as described in #143 . However, there is validation done in PyOpenSSL that isn't yet ready for primetime even in crypto-42.0. For the moment, this change gets us to newer code with a little effort.