[PyTorch][HAM]: Deprecate functionalize (#103053)
TLDR is to remove this flag and utilize functionalization functionality by lower level lib directly.
Differential Revision: [D46469134](https://our.internmc.facebook.com/intern/diff/D46469134/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/103053
Approved by: https://github.com/tugsbayasgalan
