feat(loki-mixin): updated meta-monitoring support

[bentonam]

What this PR does / why we need it:

1. Filtered the logs datasource by default to exclude Loki datasources that match (?!grafanacloud-.+(alert-state-history|usage-insights)).+
2. Added grr.libsonnet file to add better support for Grizzly so that Dashboard Folders, Dashboards and Prometheus Rules can be sync'd
3. Adds support for the meta-monitoring chart when used. The meta-monitoring chart was setting the job label to namespace/name-component

rule {
        source_labels = ["__meta_kubernetes_namespace", "__meta_kubernetes_pod_label_app_kubernetes_io_name", "__meta_kubernetes_pod_label_app_kubernetes_io_component"]
        separator = "/"
        regex = "(.*)/(.*)/(.*)"
        replacement = "${1}/${2}-${3}"
        target_label = "job"
      }

This update handles that scenario by injecting ((loki|enterprise-logs)-)? to the selectors i.e.

job="$namespace/((loki|enterprise-logs)-)?querier"

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Title matches the required conventional commits format, see here
  • Note that Promtail is considered to be feature complete, and future development for logs collection will be in Grafana Alloy. As such, feat PRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.