New command: artifact config

[alacuku]

What would you like to be added:

Add a new command for artifacts that fetches and prints to stdout the config layer:

falcoctl artifact config ghcr.io/falcosecurity/plugins/ruleset/k8saudit:latest

Output:

{
  "name": "k8saudit-rules",
  "version": "0.6.1",
  "dependencies": [
    {
      "name": "json",
      "version": "0.7.0"
    },
    {
      "name": "k8saudit",
      "version": "0.6.0",
      "alternatives": [
        {
          "name": "k8saudit-eks",
          "version": "0.2.0"
        }
      ]
    }
  ],
  "requirements": [
    {
      "name": "engine_version",
      "version": "15"
    }
  ]
}

[alacuku]

/assign @alacuku

[alacuku]

/close as completed