Upstream required changes to numba runtime

[ZzEeKkAa]

Currently we are reimplementing MemoryInfo structure and some other methods in dpex that are code duplicates. Current issue is that we need to allocate memory on host devices that prevents us from using NRT public api (does it?). We need to determine missing features in numba and upstream them so we can run public API.

[diptorupd]

I think it is a good idea and will be a good contribution to numba. We need to evaluate where and when we can fit it in our schedule.