Allow validation to take in a yaml file with the config so that tests and manual commands can automatically stay in sync. #85

flutter/devtools#9770 (comment)

Whatever is included will also need to handle custom lints. I am thinking that instead we may expose a way to pass the yaml config into the tests or make a way for the the parsing of the yaml to a dart object that is passed to tests.

Finally see if there was a way to setup custom lints with the yaml.