Suggested enhancement

Combine psa_pake_set_password_key() with psa_pake_setup(). The new signature and behaviour of psa_pake_setup() must be compliant with the standard: https://arm-software.github.io/psa-api/crypto/1.2/ext-pake/api/pake.html#c.psa_pake_setup

Justification

Mbed TLS needs this because the PSA Crypto API now has finalised the PAKE interface and we need to make this change to be compliant and to enable implementing new algorithms (like SPAKE2+).