Add more license details to license probe

What does this MR do and why?

This MR adds:

• Gitlab Version
• Gitlab Instance ID
• More license details, like add_on_products (add_on_purchased)

{
        "name": "license_probe",
        "success": true,
        "message": "Subscription can be synchronized.",
        "details": {
          "instance_id": "75b5df50-d96c-43cf-881a-49c457d46e34",
          "gitlab_version": "17.4.0-pre",
          "license": {
            "version": 1,
            "licensee": {
              "Name": "Nikola Milojevic",
              "Email": "admin@example.com",
              "Company": "Nikola Milojevic"
            },
            "starts_at": "2024-09-04",
            "expires_at": "2025-09-04",
            "notify_admins_at": "2025-08-04",
            "notify_users_at": "2025-09-18",
            "block_changes_at": "2025-09-18",
            "last_synced_at": "2024-09-04T12:20:44.000+00:00",
            "next_sync_at": "2024-09-05T12:20:44.000+00:00",
            "activated_at": "2024-09-04T11:16:00.000+00:00",
            "cloud_licensing_enabled": true,
            "offline_cloud_licensing_enabled": false,
            "auto_renew_enabled": false,
            "seat_reconciliation_enabled": false,
            "operational_metrics_enabled": false,
            "generated_from_customers_dot": true,
            "generated_from_cancellation": false,
            "temporary_extension": false,
            "restrictions": {
              "id": 12,
              "previous_user_count": null,
              "trueup_period_seat_count": null,
              "trueup_quantity": null,
              "trueup_from": null,
              "trueup_to": null,
              "active_user_count": 10,
              "subscription_id": "8a8aa0fe917ed4990191bcbe7b2f48e4",
              "subscription_name": "A-S00202226",
              "plan": "ultimate",
              "trial": false,
              "reconciliation_completed": false,
              "code_suggestions_seat_count": 0,
              "add_on_products": {
                "duo_enterprise": [
                  {
                    "quantity": 10,
                    "started_on": "2024-09-04",
                    "expires_on": "2025-09-04",
                    "purchase_xid": "C-00316247",
                    "trial": false
                  }
                ]
              }
            }
          }
        },
        "errors": {
        }
      },

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