add get_kv_connector_handshake_metadata in tpu_worker (#1254)

Author: mrjunwan-lang

tpu_inference/worker/tpu_worker.py

@@ -456,3 +456,8 @@ def sync_weights(
 
     def shutdown(self) -> None:
         return
+
+    # Ray executor do not need handshake metadata
+    # as we pass the kv_parameters through proxy server
+    def get_kv_connector_handshake_metadata(self) -> None:
+        pass