Using systemPropertiesPrefixedBy to retrieve quarkus.test properties

[cdsap]

We observed configuration cache invalidations when changing arbitrary system properties via the command line.

The root cause is the usage of System.getProperties() in the extractQuarkusTestSystemProperties method, which captures all system properties and breaks cacheability.

This PR replaces the general System.getProperties() call with Gradle’s systemPropertiesPrefixedBy provider. This returns a name-to-value map of system properties filtered by the given prefix.

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 9ccf42e.

✅ 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.

[gsmet]

Thanks!