[HUDI-2394] Implement Kafka Sink Protocol for Hudi for Ingesting Immutable Data (#3592)

- Fixing packaging, naming of classes
 - Use of log4j over slf4j for uniformity
- More follow-on fixes
 - Added a version to control/coordinator events.
 - Eliminated the config added to write config
 - Fixed fetching of checkpoints based on table type
 - Clean up of naming, code placement

Co-authored-by: Rajesh Mahindra <rmahindra@Rajeshs-MacBook-Pro.local>
Co-authored-by: Vinoth Chandar <vinoth@apache.org>

pom.xml

@@ -54,7 +54,9 @@
     <module>packaging/hudi-integ-test-bundle</module>
     <module>hudi-examples</module>
     <module>hudi-flink</module>
+    <module>hudi-kafka-connect</module>
     <module>packaging/hudi-flink-bundle</module>
+    <module>packaging/hudi-kafka-connect-bundle</module>
   </modules>
 
   <licenses>