[HUDI-2149] Ensure and Audit docs for every configuration class in the codebase (#3272)

- Added docs when missing
 - Rewrote, reworded as needed
 - Made couple more classes extend HoodieConfig

hudi-flink/src/main/java/org/apache/hudi/configuration/FlinkOptions.java

@@ -18,6 +18,7 @@
 
 package org.apache.hudi.configuration;
 
+import org.apache.hudi.common.config.HoodieConfig;
 import org.apache.hudi.common.model.HoodieTableType;
 import org.apache.hudi.common.model.OverwriteWithLatestAvroPayload;
 import org.apache.hudi.config.HoodieWriteConfig;
@@ -43,7 +44,7 @@ import java.util.Set;
  *
  * <p>It has the options for Hoodie table read and write. It also defines some utilities.
  */
-public class FlinkOptions {
+public class FlinkOptions extends HoodieConfig {
   private FlinkOptions() {
   }