[wip] [master] Migrate salt.crypt to cryptography

[dwoz]

What does this PR do?

• Migrate salt.crypt from legacy libaries to pyca/cryptography
• Migrate salt.channel.* from legacy libaries to pyca/cryptography
• Migrate salt.cloud.clouds from legacy libaries to pyca/cryptography
• Consolidate crypto library usage to salt.crypt so that future changes won't have to touch other files.
• Add tests to verify pyca/cryptography algorithms are compatible with legacy libraries.
• Add rsa_signing_algorithm and rsa_encryption_algorithm config for Minions.
• Add publish_encryption_algorithm and publish_signing_algorithm config for Masters.
• Add rsa_encryption_algorithms and rsa_signing_algorithms to config for Masters.

What issues does this PR fix or reference?

part of #66149

Merge requirements satisfied?

[NOTICE] Bug fixes or features added to Salt require tests.

• Docs
• Changelog - https://docs.saltproject.io/en/master/topics/development/changelog.html
• Tests written/updated

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