Fix adapter configuration set which returns result, but needs to be resources

[SteveL-MSFT]

PR Summary

The problem is that using PS Adapter implicitly means the engine dynamically creates a new configuration that wraps the resource with appropriate adapter (PS7 or WinPS5.1). This gets run which works fine. However, a part of set also performs a get to get the before_state. A get returns the payload as result, however, the actual before_state as defined in the configuration is resources. So the fix is to address this situation where before_state needs to be retrieved at runtime and make it look like a correct set response.