Add rkhunter in the binaries allowed to read sensitive files

[mossroy]

What type of PR is this?

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What this PR does / why we need it:

https://www.rkhunter.dev/ tool needs to read sensitive files (at least /etc/shadow)

In my custom config, I also restricted it on the host (container.id=host), this PR allows it anywhere.

[poiana]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: mossroy
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[poiana]

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