[rocketmq spark] can rocketmq-spark support spark 3.x?

spark 2.x depends on old version netty, which exists many security vulnerabilities, spark 3.x depends on new version netty, but some source code in rocketmq-spark only support spark 2.x.

The issue concerns rocketmq-spark source compatibility with Spark 3.x and its newer Netty dependency. Start by locating the source code that restricts support to Spark 2.x, then identify the compatibility changes required and verify the project builds and tests successfully with Spark 3.x. No specific files or tests are named in the issue.

Written by the indexing model from the issue text.