feat: added endpoint for checking admin groups (AAI-378)

[minh-biocommons]

Description

AAI-378: Added endpoint for checking admin groups (bundle)

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have added unit / integration tests that prove my fix is effective or that my feature works
• I have run all tests locally and they pass
• I have updated the documentation (if applicable)
• For any new secrets, I have updated the shared spreadsheet and the GitHub Secrets.

[Copilot]

Pull Request Overview

This PR adds a new endpoint /me/groups/admin-roles that allows users to retrieve a list of groups for which they have admin privileges. This complements the existing /me/platforms/admin-roles endpoint and follows a similar pattern.

Key changes:

• Added GroupAdminData response model to filter group fields returned by the API
• Implemented get_admin_groups endpoint that queries groups based on user roles
• Added comprehensive test coverage for the new endpoint

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
routers/user.py	Adds new endpoint /groups/admin-roles with filtered response model and imports BiocommonsGroup model
tests/test_user.py	Adds comprehensive test case test_get_admin_groups that validates endpoint behavior, response filtering, and permission checks

[marius-mather]

this all looks great (including the improvement for the platform admin response), thanks!