[DI] create a new key for threadLocalDebugInfo (#48762)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48762
In distributed inference, we want to use a new type info to pass some information to operators. add a new key to threadLocalDebugInfo to unblock the development.
Test Plan: Only add a new key. Should have not effect on current build.
Reviewed By: dzhulgakov
Differential Revision: D25291242
fbshipit-source-id: c71565ff7a38cc514d7cd65246c7d5f6b2ce3b8b
