ArC: document InstanceHandle.close() behavior

[Ladicek]

Fixes #33665

[github-actions]

🙈 The PR is closed and the preview is expired.

[quarkus-bot]

Status for workflow Quarkus Documentation CI

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✅ 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.

Warning

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[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit f8e7911.

✅ 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

⚙️ Maven Tests - JDK 17 Windows

📦 integration-tests/maven

✖ io.quarkus.maven.it.TestMojoIT.testThatTheTestsAreReRunMultiModule - History

• Condition with Lambda expression in io.quarkus.maven.it.continuoustesting.TestModeContinuousTestingMavenTestUtils was not fulfilled within 3 minutes. - org.awaitility.core.ConditionTimeoutException

org.awaitility.core.ConditionTimeoutException: Condition with Lambda expression in io.quarkus.maven.it.continuoustesting.TestModeContinuousTestingMavenTestUtils was not fulfilled within 3 minutes.
	at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
	at org.awaitility.core.CallableCondition.await(CallableCondition.java:78)
	at org.awaitility.core.CallableCondition.await(CallableCondition.java:26)
	at org.awaitility.core.ConditionFactory.until(ConditionFactory.java:1006)
	at org.awaitility.core.ConditionFactory.until(ConditionFactory.java:975)
	at io.quarkus.maven.it.continuoustesting.TestModeContinuousTestingMavenTestUtils.waitForNextCompletion(TestModeContinuousTestingMavenTestUtils.java:50)
	at io.quarkus.maven.it.LaunchMojoTestBase.testThatTheTestsAreReRunMultiModule(LaunchMojoTestBase.java:56)

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⚙️ Native Tests - HTTP

📦 integration-tests/rest-client-reactive

✖ io.quarkus.it.rest.client.BasicTestIT.shouldCreateClientSpans - History

• expected: <1> but was: <2> - org.opentest4j.AssertionFailedError

org.opentest4j.AssertionFailedError: expected: <1> but was: <2>
	at io.quarkus.it.rest.client.BasicTest.shouldCreateClientSpans(BasicTest.java:216)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at io.quarkus.test.junit.QuarkusTestExtension.interceptTestMethod(QuarkusTestExtension.java:810)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)