[Synapse] - library_append API adds comp parameter (Azure#13841)

* [Synapse] - add comp parameter

* Update example files

Co-authored-by: Dongwei Wang <[email protected]>

Author: idear1203

specification/synapse/data-plane/Microsoft.Synapse/preview/2019-06-01-preview/examples/Library_Append.json

@@ -2,6 +2,7 @@
   "parameters": {
     "endpoint": "exampleWorkspace.dev.azuresynapse.net",
     "libraryName": "exampleLibraryName.jar",
+    "comp": "appendblock",
     "api-version": "2019-06-01-preview",
     "content": "file binary chunk",
     "x-ms-blob-condition-appendpos": 12324

specification/synapse/data-plane/Microsoft.Synapse/preview/2019-06-01-preview/library.json

@@ -295,6 +295,7 @@
           },
           {
             "name": "x-ms-blob-condition-appendpos",
+            "x-ms-client-name": "blobConditionAppendPosition",
             "in": "header",
             "description": "Set this header to a byte offset at which the block is expected to be appended. The request succeeds only if the current offset matches this value. Otherwise, the request fails with the AppendPositionConditionNotMet error (HTTP status code 412 – Precondition Failed)",
             "required": false,
@@ -313,7 +314,18 @@
             }
           }
         }
-      }
+      },
+      "parameters": [
+        {
+          "name": "comp",
+          "in": "query",
+          "required": true,
+          "type": "string",
+          "enum": [
+            "appendblock"
+          ]
+        }
+      ]
     }
   },
   "definitions": {