Update ORTModule feature with remaining PRs from feature branch (#7040)
* Liqun/ort module perf1 (#6806)
add mysql script to log perf data
Co-authored-by: liqun <liqun@OrtTrainingDev4.af05slrtruoetgaxwwjv5nsq5e.px.internal.cloudapp.net>
* Resolve HTTP Error 503: Service Unavailable for MNIST dataset (#6989)
* Reduce logging for ORTModule for the end user (#6982)
* Support none types in forward output (#7001)
* Missed test case for none type output (#7014)
* Fix code style according to autopep8
Co-authored-by: liqunfu <liqfu@microsoft.com>
Co-authored-by: baijumeswani <bmeswani@microsoft.com>