Improve: Allow kube-bench to scan Bottlerocket OS

[felipeac]

Summary

Issue #808

This PR update kube-bench configs to support Bottlerocket OS scanning.

These were my results:

Before applying the changes requested

== Summary node ==
1 checks PASS
13 checks FAIL
1 checks WARN
0 checks INFO

== Summary total ==
1 checks PASS
13 checks FAIL
1 checks WARN
0 checks INFO

After applying the changes requested

== Summary node ==
12 checks PASS
2 checks FAIL
1 checks WARN
0 checks INFO

== Summary total ==
12 checks PASS
2 checks FAIL
1 checks WARN
0 checks INFO

After building a new Bottlerocket AMI that fixes those failed items reported by kube-bench

== Summary node ==
14 checks PASS
0 checks FAIL
1 checks WARN
0 checks INFO

== Summary total ==
14 checks PASS
0 checks FAIL
1 checks WARN
0 checks INFO

Thanks for reviewing! :)

PS: Thanks to @gregdek for the support

[codecov]

Codecov Report

Merging #809 (8772ffe) into main (5ae42eb) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #809   +/-   ##
=======================================
  Coverage   66.58%   66.58%           
=======================================
  Files          14       14           
  Lines        1257     1257           
=======================================
  Hits          837      837           
  Misses        364      364           
  Partials       56       56           

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[gregdek]

Thanks @felipeac for this; the supporting PR to fix the full scan at bottlerocket-os/bottlerocket#1295.

[yoavrotems]

LGTM
Thank you for contributing :)