[FEATURE REQUEST] x509 modules: support different output formats

[lkubb]

Is your feature request related to a problem? Please describe.
There are multiple serialization formats for x509-related types, depending on the type (private key/public key/CSR/CRL/certificate). I would like to use Salt states to generate them in the format I require directly: DER/PEM for all, additionally PKCS#12 and PKCS#7 for certificates.

Describe the solution you'd like
Add an encoding parameter to the corresponding functions in the x509 modules.

Describe alternatives you've considered
Manage the PEM and shell out or (for PKCS#12) use tls.create_pkcs12.

Additional context
#63099