KAFKA-19245: Updated default locks config for share group (#19705)

Updated default locks config for share groups from 200 to 2000. The
increase in the limit is a result from tests which showed that with
default maxFetchRecords of 500 from client and 200 as locks limit, there
can't be parallel fetch for same partition. Also the tests resulted that
sharing a partition to an index of 3-4 is easily achievable, hence
raised the limit to 4 times of default limit of maxFetchRecords (500).

Reviewers: Andrew Schofield <aschofield@confluent.io>

Author: apoorvmittal10

group-coordinator/src/main/java/org/apache/kafka/coordinator/group/modern/share/ShareGroupConfig.java

@@ -40,7 +40,7 @@ public class ShareGroupConfig {
     public static final String SHARE_GROUP_ENABLE_DOC = "Enable share groups on the broker.";
 
     public static final String SHARE_GROUP_PARTITION_MAX_RECORD_LOCKS_CONFIG = "group.share.partition.max.record.locks";
-    public static final int SHARE_GROUP_PARTITION_MAX_RECORD_LOCKS_DEFAULT = 200;
+    public static final int SHARE_GROUP_PARTITION_MAX_RECORD_LOCKS_DEFAULT = 2000;
     public static final String SHARE_GROUP_PARTITION_MAX_RECORD_LOCKS_DOC = "Share-group record lock limit per share-partition.";
 
     public static final String SHARE_GROUP_DELIVERY_COUNT_LIMIT_CONFIG = "group.share.delivery.count.limit";