Fix duration converter with multiple units

[manofthepeace]

#32929 caused a minor regression when parsing durations with multiple units. This PR fixes it and adds the tests for it.

[quarkus-bot]

Failing Jobs - Building 5173d04

Status	Name	Step	Failures	Logs	Raw logs	Build scan
✔️	JVM Tests - JDK 11
✔️	JVM Tests - JDK 17
✖	JVM Tests - JDK 20	Build	Failures	Logs	Raw logs

Full information is available in the Build summary check run.

Failures

⚙️ JVM Tests - JDK 20 #

- Failing: extensions/hibernate-orm/deployment 
! Skipped: extensions/flyway/deployment extensions/hibernate-envers/deployment extensions/hibernate-reactive/deployment and 92 more

📦 extensions/hibernate-orm/deployment

✖ io.quarkus.hibernate.orm.interceptor.ApplicationScopedInterceptorTest. - More details - Source on GitHub

java.lang.RuntimeException: java.lang.RuntimeException: Failed to start quarkus
	at io.quarkus.test.QuarkusUnitTest.beforeAll(QuarkusUnitTest.java:705)
	at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeBeforeAllCallbacks$12(ClassBasedTestDescriptor.java:395)