Create Python bindings to nvbench

[oleksandr-pavlyk]

Using Python API to nvbench one could

• use Python as benchmark driver
• analyze benchmark data in Python as they are collected
• profile kernels authored in Python, such as
  • numba kernels
  • warp kernels,
  • kernels generated by CuPy, torch, etc.
  • kernels hand-written using cuda.core
• use nvbench as backend for other Python benchmarking projects