fix: remove namespaceOverride from nvidia-dra-driver-gpu values

[yuanchen8911]

Summary

• Remove namespaceOverride: gpu-operator from nvidia-dra-driver-gpu values
• Fixes deployment failures when the component was deployed to a hardcoded "gpu-operator" namespace instead of the release namespace

Problem

The nvidia-dra-driver-gpu component values included namespaceOverride: gpu-operator, which caused:

• Deployment to "gpu-operator" namespace regardless of the Helm release namespace
• Failures when the gpu-operator namespace doesn't exist
• Inconsistent namespace behavior compared to other components

Test plan

• Deploy the bundle with helm install and verify nvidia-dra-driver-gpu deploys to the release namespace
• Verify no namespace-related errors during deployment

🤖 Generated with Claude Code

[github-actions]

Coverage Report ✅

Metric	Value
Coverage	73.7%
Threshold	70%
Status	Pass

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Coverage unchanged by this PR.