Deprecated lambda based API (#18542)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18542
This adds the deprecated API for defining kernels as lambdas. The new API for defining kernels as lambdas was introduced in D14653005.
Reviewed By: dzhulgakov
Differential Revision: D14653551
fbshipit-source-id: 99900f1436716c69e52c83b68333b642ec2c8558
