Introduction of hints for Spring Task

Updated to support timestamp demonstration of native task.

Remove experimental when appropriate for the hints and remove this `spring.aop.proxy-target-class=false` from
application.properties for timestamp demo

Updated versions to the latest boot snapshot.

spring-cloud-task-samples/timestamp/pom.xml

@@ -13,7 +13,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.0.0-M4</version>
+		<version>3.0.0-SNAPSHOT</version>
 		<relativePath />
 	</parent>
 
@@ -62,6 +62,10 @@
 			<groupId>org.mariadb.jdbc</groupId>
 			<artifactId>mariadb-java-client</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.postgresql</groupId>
+			<artifactId>postgresql</artifactId>
+		</dependency>
 	</dependencies>
 
 	<pluginRepositories>

spring-cloud-task-samples/timestamp/src/main/resources/application.properties

@@ -1,2 +1,4 @@
 spring.application.name=Demo Timestamp Task
 logging.level.org.springframework.cloud.task=DEBUG
+spring.aop.proxy-target-class=false
+