Improve third-party copy error reporting.

For EXTENDED COPY:

• improve parameters checking to report some errors before copy start;
• forward sense data from copy target as descriptor in case of error;
• report which CSCD reported error in sense key specific information.

For WRITE USING TOKEN:

• pass through real sense data from copy target instead of reporting

our copy error, since for initiator its a "simple" write, not a copy.

MFC after: 2 weeks