Add support for psa-crypto in config.py

[ronald-cron-arm]

Add support for psa-crypto repo in config.py regarding the options baremetal,baremetal_size,full,full_no_deprecated,realfull,crypto,crypto_baremetal,crypto_full.

The configuration file in psa-crypto is include/psa/crypto_config.h. It contains PSA_CRYPTO_ and PSA_WANT_ configuration options and thus config.py should be able to handle those configuration options.

We have in build_tree.py looks_like_psa_crypto_root() to detect if we are in the mbedtls or psa-crypto repo.

In psa-crypto, baremetal and crypto_baremetal are equivalent, as well as full and crypto_full. crypto does not do anything, just the default psa-crypto configuration.

[ronald-cron-arm]

Superseded by Mbed-TLS/mbedtls#9157 and Mbed-TLS/mbedtls#9158.