Avoid deserializing null nodes in reflection free Jackson serialization

[mariofusco]

Fixes #44300

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 33066b8.

✅ 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.

---

Flaky tests - Develocity

⚙️ JVM Tests - JDK 21

📦 integration-tests/virtual-threads/grpc-virtual-threads

✖ io.quarkus.grpc.example.streaming.VertxVirtualThreadTest.testEmpty - History

• INTERNAL: Half-closed without a request - io.grpc.StatusRuntimeException

io.grpc.StatusRuntimeException: INTERNAL: Half-closed without a request
	at io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:268)
	at io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:249)
	at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:167)
	at io.grpc.testing.integration.TestServiceGrpc$TestServiceBlockingStub.emptyCall(TestServiceGrpc.java:211)
	at io.quarkus.grpc.example.streaming.VirtualThreadTestBase.testEmpty(VirtualThreadTestBase.java:25)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at io.quarkus.test.junit.QuarkusTestExtension.runExtensionMethod(QuarkusTestExtension.java:969)

---

⚙️ Gradle Tests - JDK 17 Windows

📦 integration-tests/gradle

✖ io.quarkus.gradle.devmode.KotlinProjectWithCompilerArgsDevModeTest.main - History

• Condition with Lambda expression in io.quarkus.test.devmode.util.DevModeClient was not fulfilled within 2 minutes. - org.awaitility.core.ConditionTimeoutException

org.awaitility.core.ConditionTimeoutException: Condition with Lambda expression in io.quarkus.test.devmode.util.DevModeClient was not fulfilled within 2 minutes.
	at app//org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
	at app//org.awaitility.core.CallableCondition.await(CallableCondition.java:78)
	at app//org.awaitility.core.CallableCondition.await(CallableCondition.java:26)
	at app//org.awaitility.core.ConditionFactory.until(ConditionFactory.java:1006)
	at app//org.awaitility.core.ConditionFactory.until(ConditionFactory.java:975)
	at app//io.quarkus.test.devmode.util.DevModeClient.getHttpResponse(DevModeClient.java:164)
	at app//io.quarkus.gradle.devmode.QuarkusDevGradleTestBase.getHttpResponse(QuarkusDevGradleTestBase.java:164)