Repro for new MDC (?) behaviour under 3.30.5

• Bonus: Removing WithSpan in SleepAuthMechanism#authenticate will also make the test pass.

1. Clone this repo
2. Run ./gradlew test 💥
3. Update gradle.properties to have quarkusPlatformVersion=3.30.4 instead
4. Run ./gradlew test again to see it pass 🎉

MDC data set in Request filters are lost after @WithSpan-annotated methods (e.g. normal methods and/or on HttpAuthenticationMechanism(s)) are run

MDC data set in Request filters are retained after @WithSpan-annotated methods (e.g. normal methods and/or on HttpAuthenticationMechanism(s)) are run.

Quarkus 3.30.5

Quarkus =< 3.30.4