Integrate CodeQL workflow into client and server workflows

[tim-we]

Integrate CodeQL workflow into client and server workflows to avoid duplicate work. For example, right now it scans JS code on PRs that only change Java Code. And it is a separate workflow that has to set up Java and build the project.

[tim-we]

This is almost done but requires some more cleanup. In particular the client workflow should clean some stuff up before doing the CodeQL analysis as it reports findings in client/public/bundle-report.html

The Java workflow also has issues: https://github.com/KielerGames/ringofsnakes/actions/runs/7658918089
Perhaps this one could be solved by running the CodeQL initialization before running maven commands.