Add YAML linting to the pre-commit

[johnjasa]

Add YAML linting to the pre-commit

Our YAMLs look different sometimes!
We have enough of them that it should be standardized.

Proposed solution

I found this: https://github.com/adrienverge/yamllint/blob/master/.pre-commit-hooks.yaml
Could we, in one PR:

• add that to the pre-commit hook
• also lint all yaml files in the repo

Alternatives considered

Additional context