Adding all sync methods to Personalizer API (#5777)

* add stream as return type for get model

* fix response type for correct op

* change type file to stream

* remove stream ref

* Adding all sync methods to Personalizer API

* Adding all sync methods to Personalizer API

Author: dwaijam

specification/cognitiveservices/data-plane/Personalizer/readme.md

@@ -43,10 +43,10 @@ swagger-to-sdk:
 These settings apply only when `--csharp` is specified on the command line.
 ``` yaml $(csharp)
 csharp:
-  sync-methods: None
   license-header: MICROSOFT_MIT_NO_VERSION
   azure-arm: false
   namespace: Microsoft.Azure.CognitiveServices.Personalizer
   output-folder: $(csharp-sdks-folder)/CognitiveServices/dataPlane/Personalizer/Generated
+  sync-methods: all
   clear-output-folder: true
 ```