Summary: This enables the linter, but does not fix all the lint issues. We can fix then as YAML files are edited.

Test Plan: `arc lint`

Reviewers: michelle, philkuz, oazizi, #engineering

Reviewed By: oazizi, #engineering

Differential Revision: https://phab.corp.pixielabs.ai/D2313

GitOrigin-RevId: 814101c9764514c0945f316e6381a7b5258dfa25