What would you like to be added: As title

Why is this needed: All pruning schedule except AGPPruner only support level, L1, L2. While there are FPGM, APoZ, MeanActivation and Taylor, it would be much better if we can choose any pruner with any pruning schedule.

Without this feature, how does current nni work：Still good.

Components that may involve changes: I am not so sure tho.

Brief description of your proposal if any: I look into source code of some pruning schedule and it's like

if self.base_algo == 'level':
            schema = CompressorSchema([{
                'sparsity': And(float, lambda n: 0 < n < 1),
                Optional('op_types'): [str],
                Optional('op_names'): [str],
            }], model, _logger)
        elif self.base_algo in ['l1', 'l2']:
            schema = CompressorSchema([{
                'sparsity': And(float, lambda n: 0 < n < 1),
                'op_types': ['Conv2d'],
                Optional('op_names'): [str]
            }], model, _logger) 

Just add more types into it I guess?
Maybe you guys have tried others but met some bug or the loss exploded or anything.