[GPU Driver Container Resiliency] Compute and propagate driver configuration digest via environment variables

[karthikvetrivel]

Relevant PRs:

• [GPU Driver Container Resiliency] Implement userspace-only fast path when kernel modules already loaded with matching config gpu-driver-container#534
• [GPU Driver Container Resiliency] Skip driver uninstall when configuration digest matches stored state k8s-driver-manager#148

Description

• Adds driver configuration digest computation and propagation to enable fast path optimization
• Computes digest in operator controller and propagates via DRIVER_CONFIG_DIGEST environment variable to driver containers and k8s-driver-manager.
• Enables downstream components to detect unchanged configuration and skip driver uninstall/reinstall (see relevant PRs)

Checklist

• No secrets, sensitive information, or unrelated changes
• Lint checks passing (make lint)
• Generated assets in-sync (make validate-generated-assets)
• Go mod artifacts in-sync (make validate-modules)
• Test cases are added for new code paths

Testing

[cdesiniotis]

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