Register java.sql.*isClosed methods for reflection

[zakkak]

These methods are reflectively accessed starting with GraalVM for JDK
23, due to https://bugs.openjdk.org/browse/JDK-8229959 AFAIU.

Resolves errors in integration tests, see https://github.com/graalvm/mandrel/actions/runs/9540048142/job/26291954634#step:12:608

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 8b90462.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

You can consult the Develocity build scans.

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Flaky tests - Develocity

⚙️ JVM Tests - JDK 21

📦 integration-tests/reactive-messaging-kafka

✖ io.quarkus.it.kafka.KafkaConnectorTest.testFruits - History

• Assertion condition defined as a Lambda expression in io.quarkus.it.kafka.KafkaConnectorTest expected: <6> but was: <5> within 10 seconds. - org.awaitility.core.ConditionTimeoutException

org.awaitility.core.ConditionTimeoutException: Assertion condition defined as a Lambda expression in io.quarkus.it.kafka.KafkaConnectorTest expected: <6> but was: <5> within 10 seconds.
	at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
	at org.awaitility.core.AssertionCondition.await(AssertionCondition.java:119)
	at org.awaitility.core.AssertionCondition.await(AssertionCondition.java:31)
	at org.awaitility.core.ConditionFactory.until(ConditionFactory.java:1006)
	at org.awaitility.core.ConditionFactory.untilAsserted(ConditionFactory.java:790)
	at io.quarkus.it.kafka.KafkaConnectorTest.testFruits(KafkaConnectorTest.java:63)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)