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/HttpFunctionExecutor.java

@@ -79,7 +79,7 @@ public boolean handle(Request request, Response response, Callback callback) thr
       respImpl.close(callback);
     } catch (Throwable t) {
       logger.log(Level.SEVERE, "Failed to execute " + function.getClass().getName(), t);
-      Response.writeError(request, response, callback, HttpStatus.INTERNAL_SERVER_ERROR_500, null, t);
+      Response.writeError(request, response, callback, HttpStatus.INTERNAL_SERVER_ERROR_500, null);
     } finally {
       Thread.currentThread().setContextClassLoader(oldContextLoader);
       executionIdUtil.removeExecutionId();