[FEA]: Allow selecting NVCC on CI commandline

[wmaxey]

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

Infrastructure

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

In the CI entrypoint we require an opportunity to hook in a different version of NVCC.

This is required for internal testing where we might test on different release branches.

Describe the solution you'd like

Allow users to provide an optional argument overriding a default of nvcc in the CI entrypoints.

Describe alternatives you've considered

I've considered putting the incoming nvcc into $PATH earlier, but that might be overridden by CMake finding a proper CTK. It would be hacky at best.

Additional context

No response