[Profiler][Trivial] Create orchestration folder and move observer management there. (#83893)
Just a basic move. Later I'll add other subsystems. (Python, Kineto)
Differential Revision: [D38925895](https://our.internmc.facebook.com/intern/diff/D38925895/)
**NOTE FOR REVIEWERS**: This PR has internal Facebook specific changes or comments, please review them on [Phabricator](https://our.internmc.facebook.com/intern/diff/D38925895/)!
Pull Request resolved: https://github.com/pytorch/pytorch/pull/83893
Approved by: https://github.com/slgong-fb
