[CN-1029] Add support for scale subresource

[dzeromski-hazelcast]

Description

Add support for scale subresource. Users will be able to use kubectl scale with hazelcast resource. In addition we set selectorpath argument pointed to the string form of a label selector, so the HorizontalPodAutoscaler will be able to autoscale our clusters resource.

We will later need to update controller-runtime to 0.14 to be able to test it in our e2e and/or integration tests: kubernetes-sigs/controller-runtime#2072

User Impact

User can now use scale sub-command to control cluster size:

kubectl scale hazelcast example --replicas 5

[github-actions]

Test Results

	Total Tests	🔴 Failures	🟠 Errors	⚪ Skipped
OS	92	0	0	51
EE	92	1	0	18

Failed Tests

OS
EE	Hazelcast CR with Persistence feature enabled should trigger corresponding action when startupActionSpecified ForceStart

[semihbkgr]

LGTM 👍

[semihbkgr]

better to simplify this condition

if err == nil {
    return ...
}else{
    return ...
}

into this

if err != nil {
    return ...
}
return ...

[dzeromski-hazelcast]

It is not advised to to that:

1. https://go.dev/doc/effective_go#if
2. https://google.github.io/styleguide/go/decisions#indent-error-flow

[semihbkgr]

Yes, that is why I suggested.

That is the part of code that I pointed.

if err==nil{
    return r.update(ctx, h, recoptions.RetryAfter(retryAfter),
        withHzPhase(hazelcastv1alpha1.Pending),
        r.withMemberStatuses(ctx, h, err),
        withHzStatefulSet(statefulSet),
    )
} else {
    return r.update(ctx, h, recoptions.Error(err),
        withHzFailedPhase(err.Error()),
        r.withMemberStatuses(ctx, h, err),
        withHzStatefulSet(statefulSet),
    )
}