feat(BA-463): Implement APIs for associating, disassociating container_registries with groups

[jopemachine]

Resolves #3396 (BA-463).

Implement APIs for associating, disassociating container_registries with groups.

Implementation Check list

• REST API
• Graphql API
• Client SDK

Client code example

import asyncio
from ai.backend.client.session import AsyncSession

async def main():
    async with AsyncSession() as session:
        # result: {'ok': True, 'msg': 'success'}
        result = await session.ContainerRegistry.associate_group("<registry_id>", "<group_id>")

if __name__ == "__main__":
    asyncio.run(main())

GQL example

mutation {
  associate_container_registry_with_group (group_id: "<GROUP_ID>", registry_id: "<REGISTRY_ID>") {
    ok
  }
}

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Checklist: (if applicable)

• Milestone metadata specifying the target backport version
• API server-client counterparts (e.g., manager API -> client SDK)

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📚 Documentation preview 📚: https://sorna--3067.org.readthedocs.build/en/3067/

---

📚 Documentation preview 📚: https://sorna-ko--3067.org.readthedocs.build/ko/3067/

[jopemachine]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• feat(BA-143): Implement Image Rescanning using Harbor Webhook API #3116
• feat(BA-145): Implement CRUD API for managing Harbor per-project Quota #3090
• feat(BA-512): Implement ImageNode, ImageNodes as per-project images API #3036
• feat(BA-464): Implement Image RBAC project scope #3035
• refactor(BA-483): Revamp ContainerRegistryNode API #3424
• feat(BA-463): Implement APIs for associating, disassociating container_registries with groups #3067 👈 (View in Graphite)
• feat(BA-147): Implement m2m table for container_registries, and groups #3065
• main

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