ensure ingress-nginx node label is applied

[nabuskey]

fixes: #366
fixes: #367

[nimakaviani]

just a minor typo and a comment

[nimakaviani]

I wonder if this can be further simplified. I am not fond of label breaks in go, but leave it up to you.

[nabuskey]

It's really just comes down to last one winning or the first one winning. I chose first one winning. If we do last one wins, we can avoid using label breaks.

[nimakaviani]

i like first one winning too.

Here is an alternative way of writing it (thanks ChatGPT). I dont think it is any easier tho. let's leave it.

for i, node := range parsedCluster.Nodes {
    checkNodeLabels := func() {
        if node.Labels != nil {
            if v, ok := node.Labels[ingressNginxNodeLabelKey]; ok && v == ingressNginxNodeLabelValue {
                appendIngresNodeLabel = false
            }
        }
    }

    for _, pm := range node.ExtraPortMappings {
        if strconv.Itoa(int(pm.HostPort)) == c.cfg.Port {
            appendNecessaryPort = false
            nodePosition = i
            checkNodeLabels()
            break
        }
    }

    if appendNecessaryPort { // If the port was not matched, check labels
        checkNodeLabels()
        if !appendIngresNodeLabel {
            nodePosition = i
            break
        }
    }
}

[nimakaviani]

LGTM