Support Java 24

[ZheSun88]

build flow project, mvn install -DskipTests, with JDK 24-ea has failed with following error

[INFO] Test Production Bundle ............................. FAILURE [  5.127 s]
..........................................

[ERROR] Failed to execute goal com.vaadin:flow-maven-plugin:24.6-SNAPSHOT:build-frontend (default) on project test-prod-bundle: Could not execute build-frontend goal: Error occured during goal execution: Unsupported class file major version 68Please run Maven with the -e switch (or Gradle with the --stacktrace switch), to learn the full stack trace. -> [Help 1]

[caalador]

Did not encounter any issues with the build using 24-ea. Closing issue until something new pops up.