Fix config converter loading issue when arrays are used

[geoand]

We essentially use Class.forName to load the class instead of the ClassLoader directly, as the former knows how to deal with arrays

• Fixes: Configuration custom converters fail on primitive type arrays since Quarkus v3.18 #46170

[geoand]

This should also have a test, but I don't know where you want it to be @radcortez

[radcortez]

We can add a test in integration-tests/test-extension/extension. Thanks!

[geoand]

Thanks, PR updated

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 909bf16.

✅ 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

📦 extensions/opentelemetry/deployment

✖ io.quarkus.opentelemetry.deployment.logs.LoggingFrameworkTest.testLog4jLogging - History

• Expected log to have body <ValueString{Log4j Logging message}> but was <ValueString{RESTEASY004687: Closing a class org.jboss.resteasy.client.jaxrs.engines.ManualClosingApacheHttpClient43Engine$CleanupAction instance for you. Please close clients yourself.}> - org.opentest4j.AssertionFailedError

org.opentest4j.AssertionFailedError: Expected log to have body <ValueString{Log4j Logging message}> but was <ValueString{RESTEASY004687: Closing a class org.jboss.resteasy.client.jaxrs.engines.ManualClosingApacheHttpClient43Engine$CleanupAction instance for you. Please close clients yourself.}>
	at io.quarkus.opentelemetry.deployment.logs.LoggingFrameworkTest.testLog4jLogging(LoggingFrameworkTest.java:95)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at io.quarkus.test.QuarkusUnitTest.runExtensionMethod(QuarkusUnitTest.java:513)
	at io.quarkus.test.QuarkusUnitTest.interceptTestMethod(QuarkusUnitTest.java:427)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)