[yugabyte/yugabyte-db#19260] Add support for NOTHING and DEFAULT on connector

[thedhruvrawat]

Adding support for two new record types: DEFAULT and NOTHING based on Postgres replica identity types. Their behaviour for the basic queries listed below is as follows:

Queries:

CREATE TABLE t1(id INT PRIMARY KEY, v1 INT, v2 INT);
INSERT INTO t1 VALUES (1,2,3);
# Perform an update
UPDATE t1 SET v1 = 3 WHERE id = 1;
# Perform a delete
DELETE from t1 WHERE id = 1;

RECORD_TYPE	OPERATION	OLD_IMAGE	NEW_IMAGE
DEFAULT	UPDATE	{{}}	{{1},{3},{3}}
	DELETE	{{1}}	{{}}
NOTHING	UPDATE	{{}}	{{1},{3},{3}}
	DELETE	{{}}	{{}}

Also, the ALL and MODIFIED_COLUMNS_OLD_AND_NEW_IMAGES modes have been renamed to FULL and CHANGE_OLD_NEW respectively.

Have kept the old ALL and MODIFIED_COLUMNS_OLD_AND_NEW_IMAGES to maintain backward compatibility.

Test Plan

Added tests for NOTHING and DEFAULT modes

• mvn clean test -Dtest=YugabyteDBBeforeImageTest#consecutiveSingleShardTransactionsForDefault
• mvn clean test -Dtest=YugabyteDBBeforeImageTest#consecutiveSingleShardTransactionsForNothing