FindMPI: Pass -pthread to CUDA compiler through -Xcompiler
When adding this flag to imported targets, wrap it in a generator
expression to use -Xcompiler to pass the flag for CUDA.
Fixes: #17929 (closed)
When adding this flag to imported targets, wrap it in a generator
expression to use -Xcompiler to pass the flag for CUDA.
Fixes: #17929 (closed)