fix deploy to download.eclipse.org

Use the default image of .ef-download-eclipse.org job template: eclipsecbi/buildpack-deps:noble

This image has a fix for ssh connection, but has also jdk 21 which is incompatible with the code compilation.

Therefore the gradle param --no-rebuild has been added to avoid any compilation problem in this stage.

Signed-off-by: sebastien.heurtematte sebastien.heurtematte@eclipse-foundation.org