Enable spark history server

[snowch]

Check what the upstream project does:

• https://github.com/jupyter/docker-stacks/tree/main/images/pyspark-notebook
• https://jupyter-docker-stacks.readthedocs.io/en/latest/using/specifics.html#specific-docker-image-options

Test history server works on a vanilla pyspark-notebook instance.

If it works, our configuration probably over-writes the default config breaking the history server.