[1/n] Reorganize sparsity module to separate weight and attention sparsity#517

kaix-nv wants to merge 2 commits intomainNVIDIA/TensorRT-Model-Optimizer:mainfrom

kaix/weight_sparsity_reorgNVIDIA/TensorRT-Model-Optimizer:kaix/weight_sparsity_reorgCopy head branch name to clipboard