Add project filter API for Group Dependency List

What does this MR do and why?

This change introduces support for a ?project_ids[]= filter on the Group Dependency List so that end users to view dependencies that were detected in a subset of projects under a group hierarchy.

#422294 (closed)

SELECT
    sbom_occurrences.*
FROM
    sbom_occurrences
WHERE
    sbom_occurrences.project_id IN (
    SELECT
        projects.id
    FROM
        projects
    WHERE
        projects.id IN (
            37790050,
            41055203,
            44480542,
            44674376,
            51124750,
            50773741,
            21525059,
            23495190,
            31253983,
            35086421
        ) AND
        projects.namespace_id IN (
            SELECT
                namespaces.id
            FROM
                namespaces
            WHERE
                namespaces.type = 'Group' AND
                traversal_ids @> '{9970}'
        )
    )
ORDER BY
    sbom_occurrences.id ASC
LIMIT 100
OFFSET 100;

Time: 234.574 ms  
  - planning: 10.774 ms  
  - execution: 223.800 ms  
    - I/O read: 219.440 ms  
    - I/O write: 0.000 ms  
  
Shared buffers:  
  - hits: 74 (~592.00 KiB) from the buffer pool  
  - reads: 91 (~728.00 KiB) from the OS file cache, including disk I/O  
  - dirtied: 3 (~24.00 KiB)  
  - writes: 0  

https://postgres.ai/console/gitlab/gitlab-production-tunnel-pg12/sessions/23530/commands/75640

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. In rails console enable the experiment fully

   Feature.enable(:group_level_dependencies_filtering)

2. Visit any group dependency list JSON endpoint such as http://127.0.0.1:3000/groups/flightjs/-/dependencies.json
3. Append a query string parameter to filter by project e.g. ?project_ids[]=19&project_ids[]=20.
4. Verify the filtered list of results.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.