[HUDI-3451] Delete metadata table when the write client disables MDT (#5186)

* Add checks for metadata table init to avoid possible out-of-sync

* Revise the logic to reuse existing table config

* Revise docs and naming

Co-authored-by: yuezhang <yuezhang@freewheel.tv>
Co-authored-by: Y Ethan Guo <ethan.guoyihua@gmail.com>

hudi-common/src/main/java/org/apache/hudi/common/table/HoodieTableConfig.java

@@ -607,7 +607,7 @@ public class HoodieTableConfig extends HoodieConfig {
   public String getMetadataPartitions() {
     return getStringOrDefault(TABLE_METADATA_PARTITIONS, StringUtils.EMPTY_STRING);
   }
-
+  
   public Map<String, String> propsMap() {
     return props.entrySet().stream()
         .collect(Collectors.toMap(e -> String.valueOf(e.getKey()), e -> String.valueOf(e.getValue())));