add variable to network providers and add cilium per default #13346
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Description:
This PR adds Cilium to the default regex which is checked to see if the CNI Plugin used provides support for network-policies. This PR also makes this value configurable
Rationale:
Cilium does support Network Policies in different styles: https://docs.cilium.io/en/latest/security/policy/index.html
Also making it configurable, allows people to define their own values in the variable without changing sourcecode
Review Hints:
I did not have a Cilium Cluster at Hand. Therefore I checked with default CIS Profile
and a tailored profile which changes the regex and creates a false result in my environment (as expected)