Implement TransactionExtensions for pallet-pass

[pandres95]

Replace the existing bypassing logic with a TransactionExtension that:

1. Handles the authentication process.
2. Mutates the origin with a signed origin that corresponds to the AccountId of the authenticated Account, or
3. Fails with BadSignature error otherwise.

Finally, by changing this, the authenticate and dispatch calls should be deprecated. Backward compatibility is not expected from this point, as this pallet is not yet marked as stable.