Pipe: incorporate batch data into TsFileInsertionEventScanParser memory control & Subscription: close data container in tsfile event & bind memory block for tablet response & generate empty tablet as initial response & offer subsequent tablet response before ack & expose prefetch and backdoor configs & best-effort disorder control

Pipe: incorporate batch data into TsFileInsertionEventScanParser memory control & Subscription: close data container in tsfile event & bind memory block for tablet response & generate empty tablet as initial response & offer subsequent tablet response before ack & expose prefetch and backdoor configs & best-effort disorder control #15720