QConfig generation for x bits

[frneer]

We want to test sth with 2,4,6 etc bits, the same config but with different quantizers args, make a function to generate them.

Maybe too generic since we may want combinations, combinations outside.

def generate_qconfigs(base_qconfig, Dict)

{
  layer_name: {bits: [], levels: []}
  layer_other_uniform: bits[],
}