[FEA]: Pathfinder `found_via` for headers

[brandon-b-miller]

Is this a duplicate?

• I confirmed there appear to be no duplicate issues for this request and that I agree to the Code of Conduct

Area

cuda.pathfinder

Is your feature request related to a problem? Please describe.

Following #1049, I'd like to be able to see where the installation mode of the found header files. This is part of numba's libs.test debugging information.

Describe the solution you'd like

Metadata indicating which installation mode (site-packages, conda, system, or custom CUDA_HOME the CUDA headers were found through.

Describe alternatives you've considered

No response

Additional context

No response