Prep changes for loading Maven POM 4.1

[aloubyansky]

These code changes will be necessary to make the reproducer from #52190 work once we upgrade to the Maven dependency versions supporting model 4.1 API in #52491.

The reason we are not upgrading the dependency versions yet is because with the new dependency versions our CI times out. We'll need to make sure the new dependencies do not introduce memory-related issues.

I thought, given the code changes are relatively significant, it could be a good idea to merge them earlier to make sure they don't introduce regressions on their own.

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 0ce316f.

✅ 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/smallrye-reactive-messaging-kafka/deployment

❌ io.quarkus.smallrye.reactivemessaging.kafka.deployment.testing.KafkaDevServicesContinuousTestingWorkingAppPropsTestCase.testContinuousTestingScenario3 - History

• expected: <1> but was: <0> - org.opentest4j.AssertionFailedError

Details

org.opentest4j.AssertionFailedError: expected: <1> but was: <0>
	at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:158)
	at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:139)
	at org.junit.jupiter.api.AssertEquals.failNotEqual(AssertEquals.java:201)
	at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:168)
	at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:163)
	at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:662)
	at io.quarkus.smallrye.reactivemessaging.kafka.deployment.testing.KafkaDevServicesContinuousTestingWorkingAppPropsTestCase.testContinuousTestingScenario3(KafkaDevServicesContinuousTestingWorkingAppPropsTestCase.java:55)

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⚙️ JVM Tests - JDK 25 Semeru

📦 extensions/smallrye-reactive-messaging/deployment

❌ io.quarkus.smallrye.reactivemessaging.hotreload.ConnectorChangeTest.testUpdatingConnector - History

• Expecting actual: ["-4","-5","-6","-7","-8","-9","-10","-11"] to start with: ["-3", "-4", "-5", "-6"] - java.lang.AssertionError

Details

java.lang.AssertionError: 

Expecting actual:
  ["-4","-5","-6","-7","-8","-9","-10","-11"]
to start with:
  ["-3", "-4", "-5", "-6"]

	at io.quarkus.smallrye.reactivemessaging.hotreload.ConnectorChangeTest.testUpdatingConnector(ConnectorChangeTest.java:36)