Replace psa_pake_get_implicit_key() with psa_pake_get_shared_key()

[amtkarm1]

Description

Fixes Mbed-TLS/mbedtls#9322.

PR checklist

• [X] changelog will be provided
• [X] development PR provided #10061
• [X] TF-PSA-Crypto PR provided Mbed-TLS/tf-psa-crypto#189
• [X] framework PR not required
• [X] 3.6 PR not required because: no backport required
• [X] 2.28 PR not required because: no backport required
• tests provided

[amtkarm1]

The CI failure yesterday was caused by some issues with the Windows container for CI. I have restarted the CI, so it should be fine now!

[mpg]

With https://github.com/Mbed-TLS/TF-PSA-Crypto/pull/189 merged, the pointer can be updated here. The PR also needs rebasing to resolve the conflict... with the crypto pointer :)