Implement sort for list of tuples (#43448)
Summary:
* Implement tuple sort by traversing contained IValue types and generate a lambda function as comparator for sort.
* Tuple, class objects can now arbitrarily nest within each other and still be sortable
Fixes https://github.com/pytorch/pytorch/issues/43219
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43448
Reviewed By: eellison
Differential Revision: D23352273
Pulled By: gmagogsfm
fbshipit-source-id: b6efa8d00e112178de8256da3deebdba7d06c0e1
