GH-252: Fix NPE in the KinesisMessageDrivenChannelAdapter.

Fixes: https://github.com/spring-projects/spring-integration-aws/issues/252

* Adapt to Java `23`
* Upgrade to Gradle `8.12.1`
* Include `org.mockito` & `net.bytebuddy` dependencies explicitly since they are overridden
by transitive dependencies to not compatible versions with Java `23`
* Add `-parameters` compiler option to include method param names into bytecode
for better discovery by reflection

gradle/wrapper/gradle-wrapper.properties

@@ -1,7 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=1541fa36599e12857140465f3c91a97409b4512501c26f9631fb113e392c5bd1
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.1-bin.zip
+distributionSha256Sum=8d97a97984f6cbd2b85fe4c60a743440a347544bf18818048e611f5288d46c94
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12.1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME