pruning

Modules

`modelopt.torch.puzzletron.pruning.expert_removal_pruning_mixin`
`modelopt.torch.puzzletron.pruning.ffn_intermediate_pruning_mixin`
`modelopt.torch.puzzletron.pruning.kv_heads_pruning_mixin`
`modelopt.torch.puzzletron.pruning.pruning_ckpts`	Utilities for creating pruned model checkpoints.
`modelopt.torch.puzzletron.pruning.pruning_mixin`
`modelopt.torch.puzzletron.pruning.pruning_utils`

Structured pruning mixins and checkpoint utilities for Puzzletron.