style: Set DCMQI CMake version variables as "DCMQI_VERSION_*"
style: Set DCMQI CMake version variables as "DCMQI_VERSION_*"

The "DCMQI_VERSION_*" convention is now consistent with how find_package
CMake command and CPack treat version variables.

QIICR/dcmqi,QIICR/dcmqi,QIICR/dcmqi,QIICR/dcmqi,QIICR/dcmqi