feat: add security context for cleanup hook

[afrimberger]

Summary

The operator deployment already supports setting podSecurityContext and securityContext. This PR allows setting both for the cleanup Job.

Checklist

For Helm Chart changes

• Categorize the PR by setting a good title and adding one of the labels:
  bug, enhancement, documentation, change, breaking, dependency
  as they show up in the changelog
• PR contains the label area:chart
• PR contains the chart label, e.g. chart:k8up
• Variables are documented in the values.yaml using the format required by Helm-Docs.
• Chart Version bumped if immediate release after merging is planned
• I have run make chart-docs
• Link this PR to related code release or other issues.

[TheBigLee]

Hi @afrimberger Could you fix the DCO (sign the commit) so that all tests pass?

[afrimberger]

Hi @TheBigLee,

DCO is "green", now. Thanks for the hint.

I just looked at the Check list and didn't notice the red DCO build. Would be worth adding an entry "Commits signed off" to the Check list :).

[Kidswiss]

Just one more thing.

Once you've fixed this and the e2e ran through we can merge.

[TheBigLee]

@afrimberger Can you run make chart-docs once more to fix the ChartLint check?
once this is done, we'll merge this PR.

Cheers

[TheBigLee]

I just looked at the Check list and didn't notice the red DCO build. Would be worth adding an entry "Commits signed off" to the Check list :).

Thanks for the idea. We've added it to the checklist in #974