Create a test which launches a cuFunction on 2 different contexts (11.X path)

[ksimpson-work]

on cuda < 12, we return a cuFunction from get_kernel(), create an xfail test which launches the kernel on two distinct contexts

[rparolin]

@leofang Can we close this issue?

[leofang]

It would be really fun to craft this test, but it's not a must since we've dropped CUDA 11 support and starting CUDA 12+ we always use contextless loading, for which this test is moot (unlike CUfunction, CUkernel is not bound to any CUDA context, and a loaded CUkernel can be launched into any context).