Allows JH to independently control the feature license level

Related issue: Move Stream Audit Event down to Premium

Proposal

Override the Upstream license method and add specific feature level in JH.

Reference

Upstream latest updates

Extract GitlabSubscriptions::Features class

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/82129

Related MR

Upstream MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/83263