Description: Format all python files under onnxruntime with black and isort.
After checking in, we can use .git-blame-ignore-revs to ignore the formatting PR in git blame.
#11315, #11316
Support of sparse initializers with smaller indices data type to save space.
Make the script more efficient by selecting indices data type and checking resulting sparse bytes
Exclude new code from SPARSE_TENSORS
Add types support for DenseToSparse and SparseToDense conversions
Address the case of empty sparse values and indicies when the initializer does
not contain any NNZ.
Add sparsify script.
