CUDALegalization is removed in numba 0.58.x

[ggeorgakoudis]

We add the CUDALegalization pass in our CUDA lowering pipeline. This is removed in numba 0.58.x which drops support for NVVM 3.4. Possible handling:

1. try-except with or without warning
2. check numba version to add or not the pass

[DrTodd13]

@ggeorgakoudis What does Numba 0.58 do without that pass? Does it bake in some of that functionality itself or just not do any of it? My instinct is to minimize version checks and just use a try-except.

[ggeorgakoudis]

I'm adding the numba PR: numba/numba#9040. IIUC it completely removes that functionality because it deprecates support for CUDA < 11.2 and old NVVM versions.

I like avoiding numba version checks too. I do not like emitting a warning because it really shouldn't affect user experience. We can put a comment in the code and silently continue past the exception. WDYT?

[DrTodd13]

Sounds good.