[Streaming] Support streaming flow control (#7152)

* streaming writer use event driven model.

* add RefreshChannelInfo

* fix name

* minor changes according reviewer comments

* Fix according to reviewer's comments

* fix bazel lint

* code polished

* Add more comments

* rename Stop & Start of EventQueue to Freeze and Unfreeze.

* add override

* fix

* fix return value

* support flow control

* add flow control ut in mock transfer

* minor changes according to comments

* add java and python worker adaption

Co-authored-by: wanxing <wanxing.wwx@alibaba-inc.com>

streaming/src/data_reader.h

@@ -98,11 +98,13 @@ class DataReader {
 
   /// Notify input queues to clear data whose seq id is equal or less than offset.
   /// It's used when checkpoint is done.
-  ///  \param channel_info
-  ///  \param offset
-  ///
+  ///  \param channel_info consumer's channel info
+  ///  \param offset consumed channel offset
   void NotifyConsumedItem(ConsumerChannelInfo &channel_info, uint64_t offset);
 
+  //// Notify message related channel to clear data.
+  void NotifyConsumed(std::shared_ptr<DataBundle> &message);
+
  private:
   /// Create channels and connect to all upstream.
   StreamingStatus InitChannel();