Features
   * If a cipher or AEAD mechanism has a PSA driver, you can now build the
     library without the corresponding built-in implementation. See
     docs/driver-only-builds.md for full details and current limitations.
   * It is possible to disable MBEDTLS_CIPHER_C in some circumstances, please
     see docs/driver-only-builds.md for full details and current limitations.
   * The CTR_DRBG module will now use AES from a PSA driver if MBEDTLS_AES_C is
     disabled. This requires PSA_WANT_ALG_ECB_NO_PADDING in addition to
     MBEDTLS_PSA_CRYPTO_C and PSA_WANT_KEY_TYPE_AES.