Add split_with_sizes converter (#71953)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71953
Add converter for split_with_sizes
Reviewed By: yinghai
Differential Revision: D33829024
fbshipit-source-id: 50de383797a347ef7afecfbda80b2c84e244e404
(cherry picked from commit f21ced40bfc04aadf5b80c48f84649510cc3a09b)
