[mbed-tls] Apt error for invalid key ID

Hello,

In psa_validate_key_attributes(), when the key ID is invalid for persistent keys the function returns PSA_ERROR_INVALID_ARGUMENT. See https://github.com/Mbed-TLS/mbedtls/blob/development/library/psa_crypto.c#L1....

The comments for PSA_ERROR_INVALID_ARGUMENT explicitly states that this error should not be returned when key identifier is invalid, instead PSA_ERROR_INVALID_HANDLE should be returned.

For the above psa_validate_key_attributes() usecase, which is the correct return code - PSA_ERROR_INVALID_ARGUMENT or PSA_ERROR_INVALID_HANDLE?

Regards, Archanaa