GH-3866: DefLockRepository: expose query setters (#8606)

Fixes https://github.com/spring-projects/spring-integration/issues/3866

Some RDBMS vendors (or their JDBC drivers) may just log the problem
without throwing an exception.

* Expose setters for UPDATE and INSERTS queries in the `DefaultLockRepository`
to let end-user to modify them respectively, e.g. be able to add a PostgreSQL
`ON CONFLICT DO NOTHING` hint.
* Refactor `DefaultLockRepository` to `Instant` instead of `LocalDateTime`
with zone offset.
* Refactor `ttl` property to `Duration` type
* Fix `dead-lock` typo to `deadlock`

spring-integration-jdbc/src/test/java/org/springframework/integration/jdbc/lock/JdbcLockRegistryTests-context.xml

@@ -24,6 +24,8 @@
 
 	<bean id="lockClient" class="org.springframework.integration.jdbc.lock.DefaultLockRepository">
 		<constructor-arg name="dataSource" ref="dataSource"/>
+		<property name="insertQuery"
+				  value="INSERT INTO INT_LOCK (REGION, LOCK_KEY, CLIENT_ID, CREATED_DATE) VALUES (?, ?, ?, ?)"/>
 	</bean>
 
 	<tx:annotation-driven/>