cpp: Handle smart card op failure status messages

* lang/cpp/src/editinteractor.cpp (parse_sc_op_failure): New.
(CallbackHelper::edit_interactor_callback_impl): Parse failure code on
GPGME_STATUS_SC_OP_FAILURE status.
(sc_op_failure_to_error): New.

This converts a SC_OP_FAILURE status message logged by gpg to a
corresponding error. Unfortunately, GPG_ERR_BAD_PIN and
GPG_ERR_BAD_RESET_CODE are mapped to the same SC_OP_FAILURE code, so
that we had to choose one.

• GnuPG-bug-id: T6971