chore(implementation)!: use Jetty-12 core without servlets

Port the invoker to upgrade to Eclipse Jetty-12 version 12.  Specifically using the new core APIs of Eclipse Jetty-12 that allow the overhead of a Servlet container to be avoided.

BREAKING CHANGE: use Java 17 or above, as required by Eclipse Jetty-12.

Signed-off-by: Lachlan Roberts <[email protected]>

Author: lachlan-roberts

invoker/core/src/main/java/com/google/cloud/functions/invoker/http/TimeoutHandler.java

@@ -15,8 +15,9 @@
 package com.google.cloud.functions.invoker.http;
 
 import java.time.Duration;
-import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicBoolean;
+import org.eclipse.jetty.http.BadMessageException;
+import org.eclipse.jetty.http.HttpStatus;
 import org.eclipse.jetty.server.Handler;
 import org.eclipse.jetty.server.Request;
 import org.eclipse.jetty.server.Response;
@@ -41,7 +42,7 @@ public boolean handle(Request request, Response response, Callback callback) thr
             .getComponents()
             .getScheduler()
             .schedule(
-                () -> wrappedCallback.failed(new TimeoutException("Function execution timed out")),
+                () -> wrappedCallback.failed(new BadMessageException(HttpStatus.REQUEST_TIMEOUT_408, "Function execution timed out")),
                 timeout);
 
     // Cancel the timeout if the request completes the callback first.