Change language and bytecode levels to Java 25 (#3009)

Release/Build tested in alpha.

Deployed in crash.

jetty/Dockerfile

@@ -1,10 +1,15 @@
-FROM jetty:12-jdk21
+FROM jetty:12-jdk25
 ADD --chown=jetty:jetty build/jetty-base /jetty-base
 ADD --chown=jetty:jetty start.sh /
 ADD --chown=jetty:jetty logging.properties /
 
 USER root
 
+# wget is not installed by default in :12-jdk25
+RUN apt-get update && \
+    apt-get install -y wget && \
+    rm -rf /var/lib/apt/lists/*
+
 # Create a directory, download and extract the Cloud Profiler agent, version locked to "cloud-profiler-java-agent_20241028_RC00.tar.gz".
 RUN mkdir -p /opt/cprof && \
     wget -q -O- https://storage.googleapis.com/cloud-profiler/java/cloud-profiler-java-agent_20241028_RC00.tar.gz\
@@ -14,6 +19,6 @@ RUN mkdir -p /opt/cprof && \
 USER jetty
 
 EXPOSE 8080
-# jetty:12-jdk21 has bash. We can afford the extra 200M in image size over
+# jetty:12-jdk25 has bash. We can afford the extra 200M in image size over
 # the -alpine flavor.
 ENTRYPOINT ["/bin/bash", "/start.sh"]