As a user I would like to use alloy-metrics collector to scrape ServiceMonitor metrics instead of prometheus

In order to start the transition to use alloy-metrics as the default metrics scraper instead of prometheus we will need to:

1. If a user enables the monitoring package and alloy-metrics with scrapeConfig enabled, alloy will collect the metrics and publish to prometheus, In the same config BB should disable prometheus from scraping metrics to not collect metrics twice.
2. If a user enables monitoring and mimir with alloy-metrics scrapeConfig enabled, then alloy should push the metrics to both prometheus and mimir. (Do not configure prometheus to push to mimir)
3. Have the ability to have alloy-metrics just publish metrics to mimir and not prometheus.