[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>

hudi-kafka-connect/configs/connect-distributed.properties

@@ -0,0 +1,33 @@
+##
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+##
+
+bootstrap.servers=localhost:9092
+group.id=hudi-connect-cluster
+key.converter=org.apache.kafka.connect.json.JsonConverter
+value.converter=org.apache.kafka.connect.json.JsonConverter
+key.converter.schemas.enable=true
+value.converter.schemas.enable=true
+offset.storage.topic=connect-offsets
+offset.storage.replication.factor=1
+config.storage.topic=connect-configs
+config.storage.replication.factor=1
+status.storage.topic=connect-status
+status.storage.replication.factor=1
+
+offset.flush.interval.ms=60000
+listeners=HTTP://:8083
+plugin.path=/usr/local/share/java,/usr/local/share/kafka/plugins,/opt/connectors,