Mark FlinkKinesisProducer/FlinkKinesisConsumer as deprecated

This consumer based on the Kinesis Consumer Library (KCL) has been deprecated, a Jira to create an equivalent consumer based on AWS SDK for Java 2.x has been raised in FLINK-25729 and planned for Flink 1.16.

This producer based on the Kinesis Producer Library KPL has been superseded. The new sink can be found in the module flink-connectors/flink-connector-aws-kinesis-data-streams and package org.apache.flink.connector.kinesis.sink.KinesisDataStreamsSink. It is based on the AWS SDK for Java 2.x. The work to replace this sink was carried out in FLINK-24227.