fix: move incoming value ownership on consumption

Signed-off-by: Roman Volosatovs <[email protected]>

wit/types.wit

@@ -59,14 +59,14 @@ interface types {
 	resource incoming-value {
 		/// Consumes the value synchronously and returns the value as a list of bytes.
 		/// If any other error occurs, it returns an `Err(error)`.
-    	incoming-value-consume-sync: func() -> result<incoming-value-sync-body, error>;
+    	incoming-value-consume-sync: static func(this: incoming-value) -> result<incoming-value-sync-body, error>;
 		/// Consumes the value asynchronously and returns the value as an `input-stream`.
 		/// If any other error occurs, it returns an `Err(error)`.
-	    incoming-value-consume-async: func() -> result<incoming-value-async-body, error>;
+	    incoming-value-consume-async: static func(this: incoming-value) -> result<incoming-value-async-body, error>;
 		/// The size of the value in bytes.
 		/// If the size is unknown or unavailable, this function returns an `Err(error)`.
 	    incoming-value-size: func() -> result<u64, error>;
 	}
     type incoming-value-async-body = input-stream;
     type incoming-value-sync-body = list<u8>;
-}
+}