BB 3.0 - Replace promtail with alloy-logs in the k8s-monitoring v2 chart

This task is to go-out with the BB 3.0 release

With promtail not being activity developed by grafana, they have moved to alloy as the standard log/metrics/trace collector for the LGTM stack. https://grafana.com/docs/loki/latest/send-data/promtail/

• Disable promtail in the BB values.yaml by default
  • NOTE: Promtail will be removed entirely in a later release (Current Target 3.05)
• Enabled Alloy in the BB values.yaml by default