[FEATURE] Add a required license check to CI

[jacobsalway]

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[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[github-actions]

This issue has been automatically closed because it has not had recent activity. Please comment "/reopen" to reopen it.

[ChenYi015]

/reopen
/lifecycle frozen

[google-oss-prow]

@ChenYi015: Reopened this issue.

In response to this:

/reopen
/lifecycle frozen

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