[CI] pre-commit: auto add license templates to headers of TOML files

[jbampton]

refs #1647

Did you read the Contributor Guide?

• Yes, I have read the Contributor Rules and Contributor Development Guide

Is this PR related to a JIRA ticket?

• No:
  • this is a CI update. The PR name follows the format [CI] my subject

What changes were proposed in this PR?

This PR adds another check/test/hook to our pre-commit framework

So far just targets TOML files.

Using pre-commit we can auto add license headers to files on git commit or when running pre-commit run --all-files

How was this patch tested?

Tested with pre-commit both before and after the license header was added.

Did this PR include necessary documentation updates?

• No, this PR does not affect any public API so no need to change the documentation.