[Onboarding] Make UI components keycard terminology consistent with Keycard API

[igor-sirotin]

We should follow Keycard API names of the functions:

1. Initialize(pin, puk) - to be used when you get a factory empty keycard. This way we set the PIN (and PUK).
2. Authorize(pin) - to be used to access authorized-only API of the keycard, e.g. LoadMnemonic, SignTransaction, etc.
3. Unblock(puk) - to be used in BlockedPIN` state, i.e. unblock the keycard with PUK.
4. LoadMnemonic / GenerateMnemonic - no "seed phrase"/"seed words".

setPin/setPuk should not exist.

Also I think we sometimes use setPin to collect the PIN during onboarding and pass it later to finihsed signal.
I'm not sure, but probably we don't need to do this and PIN is always used right away to authorize the Keycard. But this needs to be double-checked.

Also, tst_OnboardingLayout login with keycard test should be reviewed after this. Details here: #17127 (comment)