Fix/Improve bound shape inference with real net tests (#16597)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16597
This diff fixes some bugs in shape inference for `SparseLengthsSumFused8BitRowwise`. And added input shape inference for `Concat` when `add_axis=1`.
Reviewed By: bertmaher
Differential Revision: D13892452
fbshipit-source-id: 6cd95697a6fabe6d78a5ce3cb749a3a1e51c68e7
