fix(validator): use DRA GA API for dra-support check

[yuanchen8911]

Summary

Switch the dra-support check API gate from resource.k8s.io/v1beta1 to resource.k8s.io/v1 so the check no longer false-skips on K8s 1.34+ clusters where DRA graduated to GA.

Motivation / Context

DRA graduated to GA (resource.k8s.io/v1) in K8s 1.34 and v1beta1 was removed. The dra-support check gated on v1beta1 discovery, causing it to skip on 1.34+ clusters even though DRA was fully operational (confirmed by secure-accelerator-access check which successfully creates ResourceClaims and runs GPU workloads via DRA).

Fixes: #491
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/aicr, pkg/cli)
• API server (cmd/aicrd, 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: ____________

Implementation Notes

• Changed the API discovery gate at dra_support_check.go:41 from resource.k8s.io/v1beta1 to resource.k8s.io/v1
• No v1beta1 fallback — all downstream DRA code (ResourceSlices, ResourceClaims, secure_access_check.go, gang_scheduling_check.go) already uses resource.k8s.io/v1 exclusively
• Skip message now clarifies "requires K8s 1.34+"
• This is a 2-line change in the check itself (gate version + skip message)

Testing

go test -v -race ./validators/conformance/ -run TestCheckDRASupport
golangci-lint run ./validators/conformance/

• TestCheckDRASupport_SkipsWhenNoDRAAPI — no DRA API registered, check skips gracefully
• TestCheckDRASupport_V1GatePassesThenChecksDriver — v1 API present, check proceeds past gate to driver detection (does not false-skip)
• Note: tests are focused on the API gate fix; full DRA happy path (driver pods, ResourceSlices, allocation) requires a live cluster

Risk Assessment

• Low — Isolated change, well-tested, easy to revert

Rollout notes: Clusters running K8s < 1.34 that only have v1beta1 will now see the check skip with a clear message about requiring K8s 1.34+. This is correct behavior since all DRA validation code uses the GA API.

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)

[github-actions]

Coverage Report ✅

Metric	Value
Coverage	74.5%
Threshold	70%
Status	Pass

Coverage Badge

![Coverage](https://img.shields.io/badge/coverage-74.5%25-green)

Coverage unchanged by this PR.