* [HUDI-3730] Improve meta sync class design and hierarchies (#5754)
* Implements class design proposed in RFC-55
Co-authored-by: jian.feng <fengjian428@gmial.com>
Co-authored-by: jian.feng <jian.feng@shopee.com>
* Fix flaky MOR unit test
* Update Spark APIs to make it be compatible with both spark2 & spark3
* Refactor bulk insert v2 part to make Hudi be able to compile with Spark3
* Add spark3 profile to handle fasterxml & spark version
* Create hudi-spark-common module & refactor hudi-spark related modules
Co-authored-by: Wenning Ding <wenningd@amazon.com>
