Add Kineto submodule (separate PR) (#48332)
Summary:
Separate PR to add Kineto submodule, mirrors the one I used
in my stack (45887)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48332
Reviewed By: gdankel
Differential Revision: D25139969
Pulled By: ilia-cher
fbshipit-source-id: b9ca2be5f15647655eeb4b2fbf4c82f84eee3dd8
