[EPIC] Reducing binary size of `libcuvs.so`

In general, the binary size of a project is very relevant to integrations as the cost of storage, deployment, and distribution of project binaries is non-trivial.

Keeping this in mind, we have 3 approaches to take that would reduce the binary size of libcuvs.so:

1. Removing all duplicate instantiations of kernels - In CUDA whole compilation mode, kernels are kept as a copy in every single TU that instantiates them and the linker phase does not run deduplication.
2. Smarter template engineering - C++ templates create cross-product of kernel function-template instantiations.
3. JIT LTO - This involves compiling kernels as LTO-IR format fatbins, and JITing to target architecture at runtime.

For first two points, techniques to reduce bloat are described here https://gist.github.com/divyegala/cf8977bbe7fb4a2f492935dd46eb7fd3.