ci: include test folder in license check

[jasonliu747]

Ⅰ. Describe what this PR does

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

V. Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in make test

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@f02a02a). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1203   +/-   ##
=======================================
  Coverage        ?   65.74%           
=======================================
  Files           ?      290           
  Lines           ?    30647           
  Branches        ?        0           
=======================================
  Hits            ?    20150           
  Misses          ?     9018           
  Partials        ?     1479           

Flag	Coverage Δ
unittests	65.74% <ø> (?)

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[eahydra]

/lgtm
/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: eahydra

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