Declarative assemblyFormat ODS is more concise and requires less
boilerplate than filling out CPP interfaces.
Changes:
* updates the Ops defined in `SPIRVNonUniformOps.td and
SPIRVGroupOps.td` to use assemblyFormat.
* Removes print/parse from `GroupOps.cpp` which is now generated by
assemblyFormat
* Updates tests to updated format (largely using <operand> in place of
"operand" and complementing type information)
Issue: #73359
4df5310ffc