feat: add DRA and gang scheduling test manifests for CNCF AI conformance

[yuanchen8911]

Summary

Add test manifests for validating DRA GPU allocation and KAI scheduler gang scheduling,
supporting CNCF AI conformance evidence collection.

Motivation / Context

These manifests provide repeatable test cases for two key CNCF AI conformance areas:
DRA-based GPU allocation and gang scheduling with KAI scheduler.

Fixes: N/A
Related: N/A

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactoring (no functional changes)
• Build/CI/tooling

Component(s) Affected

• CLI (cmd/eidos, pkg/cli)
• API server (cmd/eidosd, pkg/api, pkg/server)
• Recipe engine / data (pkg/recipe)
• Bundlers (pkg/bundler, pkg/component/*)
• Collectors / snapshotter (pkg/collector, pkg/snapshotter)
• Validator (pkg/validator)
• Core libraries (pkg/errors, pkg/k8s)
• Docs/examples (docs/, examples/)
• Other: Test manifests (tests/manifests/)

Implementation Notes

• tests/manifests/dra-gpu-test.yaml — Creates namespace, ResourceClaim, and Pod to validate
  DRA GPU allocation via gpu.nvidia.com device class
• tests/manifests/gang-scheduling-test.yaml — Creates namespace and PyTorchJob (1 Master +
  1 Worker) to validate KAI scheduler gang scheduling via PodGroup creation

Testing

make lint

Manifests tested manually on H100 EKS cluster.

Risk Assessment

• Low — Isolated change, well-tested, easy to revert
• Medium — Touches multiple components or has broader impact
• High — Breaking change, affects critical paths, or complex rollout

Rollout notes: N/A

Checklist

• Tests pass locally (make test with -race)
• Linter passes (make lint)
• I did not skip/disable tests to make CI green
• I added/updated tests for new functionality
• I updated docs if user-facing behavior changed
• Changes follow existing patterns in the codebase
• Commits are cryptographically signed (git commit -S) — GPG signing info

[mchmarny]

lgmt