Add License information to the Dependency List - add license info backend

Sub issue for https://gitlab.com/gitlab-org/gitlab-ee/issues/10536

• Parse License information https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/15157
• Merge this information to Dependency List report https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/15157
• Add licenses to response !15160 (merged)

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found issues during development:

• Licenses are empty https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/15818