Add license file to KAS UBI image

What does this MR do?

Adds license file to the UBI image for KAS.

Related issues

Closes gitlab-org/charts/gitlab#3694 (closed)

Testing

preflight check container registry.gitlab.com/gitlab-org/build/cng/gitlab-kas:kas-add-license-fips
...
time="2022-09-19T21:12:12Z" level=info msg="Preflight result: PASSED"

Checklist

See Definition of done.

For anything in this list which will not be completed, please provide a reason in the MR discussion

Required

• Merge Request Title, and Description are up to date, accurate, and descriptive
• MR targeting the appropriate branch
• MR has a green pipeline on GitLab.com

Expected (please provide an explanation if not completing)

• Test plan indicating conditions for success has been posted and passes
• Documentation created/updated
• Integration tests added to GitLab QA
• The impact any change in container size has should be evaluated