Add support for cancelled subscription licenses

What does this MR do and why?

This MR updates the gitlab-license gem to the latest version and introduces some logic to the License model to allow the processing of a generated_from_cancellation license resulting from the seat link sync to CDot.

• We create a license using the license_key received from CDot. This new license will be expired so we skip the expired_date validation for online_cloud licenses that have generated_from_cancellation=true
• Then, when loading the current license we ensure we skip non-expired license versions belonging to a cancelled subscription (by subscription name)

Related issue

https://gitlab.com/gitlab-org/gitlab/-/issues/411863 (internal)

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