Cluster nodes OS type filtering in OperatorHub - Console operator

Console operator should be building up a set of cluster nodes OS types, which he should supply to console, so it renders only operators that could be installed on the cluster.

This will be needed when we will support different OS types on the cluster.

We need to scan through the compute nodes and build a set of supported OS from those. Each node on the cluster has a label for its operating system: e.g. kubernetes.io/os=linux,

AC:

1. Implement logic in the console-operator that will scan though all the nodes and build a set of all the OS types that the cluster nodes run on and pass it to the console-config.yaml . This set of OS types will be then used by console frontend.
2. Add unit and e2e test cases in the console-operator repository.