pytorch

31d5a300 - quant: make RecordingObserver inherit from ObserverBase (#76460)

quant: make RecordingObserver inherit from ObserverBase (#76460) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/76460 `RecordingObserver` inherits from `_ObserverBase` but does not use any functionality from it. Making it inherit from `ObserverBase` instead. This will make it simpler to rename `_ObserverBase` to something more meaningful in the next PR. Test Plan: CI Reviewed By: jerryzh168 Differential Revision: D35976351 Pulled By: vkuzo fbshipit-source-id: 19c106bf0d48607c231702e2e048f42a7f48a5c6 (cherry picked from commit 4fd44123b0e9bcdcae546aecabe80d7642129cf5)