[Discussion] Rename --labels-metric-allow-list

[mrueg]

What would you like to be added:

Why is this needed:
--labels-metric-allow-list is inconsistent with --metric-allowlist and there might be a better name for it, that is more descriptive on what it's doing.
Describe the solution you'd like

• Use one way to write allowlist/allow-list in flags
• Reorder --labels-metric to --metric-labels
• Consider using passthrough or filter as with allowlist folks might wonder if there's a denylist as well.

This is how it could read:

      --metric-labels-passthrough string  Comma-separated list of additional Kubernetes label keys that will be used in the resource' labels metric. By default the metric contains only name and namespace labels. To include additional labels provide a list of resource names in their plural form and Kubernetes label keys you would like to allow for them (Example: '=namespaces=[k8s-label-1,k8s-label-n,...],pods=[app],...)'

[mrueg]

Resolved in mrueg@2a7a96b