improve task creation and cancellation

If a FrameProcessor needs to create a task it should use
FrameProcessor.create_task() and FrameProcessor.cancel_task(). This gives
Pipecat more control over all the tasks that are created in Pipecat.

Both functions internally use the utils module: utils.create_task() and
utils.cancel_task() which should also be used outside of FrameProcessors. That
is, unless strictly necessary, we should avoid using asyncio.create_task().

src/pipecat/services/websocket_service.py

@@ -85,10 +85,6 @@ class WebsocketService(ABC):
                 await self._receive_messages()
                 logger.debug(f"{self} connection established successfully")
                 retry_count = 0  # Reset counter on successful message receive
-
-            except asyncio.CancelledError:
-                break
-
             except Exception as e:
                 retry_count += 1
                 if retry_count >= MAX_RETRIES: