Implement group-level dependency list export API

What does this MR do and why?

This MR introduces a new API endpoint to create group-level dependency list exports.

Database review

This MR introduces a new SQL query to pass through the sbom_occurrences table for a given group.

Lower bound SQL query

SELECT
    "sbom_occurrences"."id"
FROM
    "sbom_occurrences"
WHERE
    "sbom_occurrences"."project_id" IN (
        SELECT
            "projects"."id"
        FROM
            "projects"
        WHERE
            "projects"."namespace_id" IN (
                SELECT
                    namespaces.traversal_ids[array_length(namespaces.traversal_ids, 1)] AS id
                FROM
                    "namespaces"
                WHERE
                    "namespaces"."type" = 'Group'
                    AND (traversal_ids @> ('{9970}'))))
    ORDER BY
        "sbom_occurrences"."id" ASC
    LIMIT 1 OFFSET 0

https://console.postgres.ai/gitlab/gitlab-production-tunnel-pg12/sessions/19547/commands/64111

Iteration SQL query

SELECT
    "sbom_occurrences"."id"
FROM
    "sbom_occurrences"
WHERE
    "sbom_occurrences"."project_id" IN (
        SELECT
            "projects"."id"
        FROM
            "projects"
        WHERE
            "projects"."namespace_id" IN (
                SELECT
                    namespaces.traversal_ids[array_length(namespaces.traversal_ids, 1)] AS id
                FROM
                    "namespaces"
                WHERE
                    "namespaces"."type" = 'Group'
                    AND (traversal_ids @> ('{9970}'))))
        AND "sbom_occurrences"."id" >= 277
    ORDER BY
        "sbom_occurrences"."id" ASC
    LIMIT 1 OFFSET 1000

https://console.postgres.ai/gitlab/gitlab-production-tunnel-pg12/sessions/19547/commands/64112

Related to #408838 (closed)

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