Upgrade Jetty 9 test dependencies to 9.4.58.v20250814

[r-u-d-r-a-a]

Description

Updates the test-scoped Jetty dependencies from 9.4.55.v20240627 to 9.4.58.v20250814.

Jetty 9, 10, and 11 stopped being published to Maven Central on January 1, 2026. The project was using 9.4.55.v20240627, while 9.4.58.v20250814 is the final release in the Jetty 9.4 line and is available from Maven Central.

This update moves the project forward by three patch releases while remaining on the same Jetty 9.4 release line. The Jetty dependencies are used only with test scope for the proxy tests, so this change does not affect the artifacts produced by the plugin.

Jetty 12 is not used because it requires Java 17, while the project's test matrix still includes JDK 8. A migration to Jetty 12 or an alternative test HTTP implementation can be revisited when the project's Java and CI requirements change.

Changes

• Updated <jetty.version> from 9.4.55.v20240627 to 9.4.58.v20250814.
• Kept all Jetty dependencies and their scopes unchanged.
• No production code or runtime behavior was modified.

Testing

• Ran mvn verify
• Ran mvn -Prun-its verify

Checklist

• This pull request addresses a single issue without unrelated changes.
• The pull request description explains what was changed and why.
• The change is limited to updating the Jetty test dependency version.
• No behavioral changes requiring additional unit tests were introduced.
• mvn verify completed successfully.
• mvn -Prun-its verify completed successfully.
• I hereby declare this contribution to be licensed under the Apache License Version 2.0, January 2004.