Add passkey services & disable policy

Related to #569933 (closed)

• MR 1 of 4
• A series of MRs were segmented from !209582 (closed) to make reviewing easier
  • !211326 (merged) & !211371 (merged) can be merged independently
  • !211467 (previous MRs added as a merge dependency)
  • !211616 (previous MRs added as a merge dependency)
• See !209582 (closed) for more context

What does this MR do and why?

• Adds authenticate, register & destroy services
• Add :disable_passkey policy to handle passkey deletion

• Adds services, factory & a new policy

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