Add EOL check for the cluster used for testing a chart (e.g. testedOpenShiftversion)

[komish]

It's logical to make sure that either

• the cluster used for testing a chart with chart-verifier is not an OpenShift EOL cluster, or
• the cluster used for testing a chart with chart-verifier fits within the kubeVersion range.

The former makes more sense, but may be a bit complicated to implement. We may be able to add and manage this information in a library https://github.com/opdev/getocprange, or otherwise need to talk to Pyxis to get this information (which adds a network call).

[acornett21]

The logic for what you need can be found below:

https://github.com/redhat-openshift-ecosystem/operator-certification-operator/blob/c4530a7b805e5a7fb6eff9176ae69de2fd47e5fd/internal/pyxis/pyxis.go#L31-L72