Galaxy does not support signature verification?

[samccann]

Ansible Galaxy may not support signature verification, but our documentation suggests that it does:
https://docs.ansible.com/ansible/latest/collections_guide/collections_installing.html#installing-collections-with-signature-verification

https://docs.ansible.com/ansible/latest/dev_guide/developing_collections_distributing.html#distributing-collections

Goal of this issue:
1 - Verify that Galaxy doesn't support these features and that they are Automation Hub features only.
2. Remove the misleading documentation.

[samccann]

What I've learned so far:

• The galaxy CLI can validate signatures, regardless of the backend (server - galaxy vs AH).
• galaxy.ansible.com does not have signatures enabled, but someone can still distribute their own signatures and use the galaxy CLI to verify them.

Still TBD but I'm thinking mentions of AH should be removed at this point. That detail should be in official RH docs, not here in the community docs.