Upload abortion is now detected within the  OC_Connector_Sabre_File::put...

...()

OC_Connector_Sabre_AbortedUploadDetectionPlugin is pointless

fixes #9302 

@karlitschek @craigpg OC7 relevant as it kills data?

@PVince81 @rperezb 
I guess this is fine for now (at least it works correctly), but at some point we need to find a way to bypass the trashbin hooks. CC @schiesbn 
On the other hand we cannot use `unlink()` directly because it won't work with object store any more.

So let's leave it as is for now.