[mbed-tls] Mbed TLS4.0 - Remove legacy cipher APIs​

Hi,

In mbedTLS road map, there is a future task to remove legacy cipher API (https://developer.trustedfirmware.org/w/mbed-tls/roadmap/). Does that mean all existing mbedtls crypto APIs will not be supported anymore?

mbedTLS is used for both its TLS and crypto library. I am curious how the planned changes will affect both set of users.

* Are the crypto library users expected to only use PSA crypto APIs and key IDs? * Are the TLS library users expected to see API changes to TLS functions to support key IDs?

Thank, Archanaa