100% UQL and 4 new dashboards

What's Changed

Fresh dashboards

• Add squid dashboard by @heydbut in #61
• bump squid version by @nslaughter in #68
• nomad dashboard by @altuner in #73
• Add gunicorn dashboard by @heydbut in #71

Upgrade remnant legacy queries

• Updates Kafka dashboard to UQL by @nslaughter in #75
• Update Kubeletstats to UQL only by @nslaughter in #74
• Update CouchDB to use UQL only by @nslaughter in #79
• Update Nginx to use only UQL by @nslaughter in #78
• Update host dashboard to use only UQL by @nslaughter in #77

Full Changelog: v1.76.0...v1.76.0-20230503