Fix bug in TransformerMemcpy (#1413)
* Initial commit
* Add test case
* Revert unintentional change
* Update comments
* Resolve PR feedback
* Craft test casse and add more logs
* Fix build failures
* Fix minor bug in the way modified is updated
* Remove full model inference session test
* Resolve PR comments
* Resolve more PR feedback
* Resolve more PR feedback
* Resolve more PR comments
* Remove logging
* Move GetInitializer() method to memcpy_transformer scope
* Remove some unnecessary blank lines
* Make GetInitializer static
