[BACKPORT 2.16][#15952] YSQL: Reduce verbosity of a Postgres log line…

… in read committed isolation level codepath

Summary: Original commit: dd239e4 / D22755

Test Plan: Jenkins

Reviewers: mihnea, yguan

Reviewed By: mihnea, yguan

Subscribers: mihnea, yql

Differential Revision: https://phabricator.dev.yugabyte.com/D22776

src/postgres/src/backend/utils/time/snapmgr.c

@@ -379,7 +379,7 @@ GetTransactionSnapshot(void)
 	 */
 	if (IsYBReadCommitted() && YBGetDdlNestingLevel() == 0)
 	{
-		elog(LOG, "Resetting read point for statement in Read Committed txn");
+		elog(DEBUG2, "Resetting read point for statement in Read Committed txn");
 		HandleYBStatus(YBCPgFlushBufferedOperations());
 		HandleYBStatus(YBCPgResetTransactionReadPoint());
 	}