refactor: use patch for clickhouse settings

[Ian2012]

Refactor the clickhouse settings with patches, allowing it more flexibility.

Mounts file individually instead of mounting the whole users folders in k8s, allowing clickhouse to write to the file it needs to.

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[bmtcril]

LGTM, I think we should comment in the patches that these only work on Tutor-based instances and not cloud hosted ones, though, just to prevent confusion.

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