fix: remove override command in k8s job

[mariajgrimaldi]

Description

This PR removes the command override from the clickhouse job which prevented its execution. This override it's not needed since tutor adds something similar when rendering the job:

So with the command override:

Without the override:

How to test

Run: tutor k8s do init --limit clickhouse then get the job output.

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[itsjeyd]

Hey @mariajgrimaldi, thank you for this contribution. Are the changes ready for review?

[itsjeyd]

label: core contributor

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