fix(templates): dynamic CUDA repo arch for arm64 support

[ArangoGutierrez]

Summary

• Replace hardcoded x86_64 in CUDA repository URL with runtime uname -m detection
• Map aarch64 to sbsa (NVIDIA's arm64 server CUDA repo convention)
• Add dedicated test verifying no hardcoded x86_64 and proper arch mapping

Test plan

• Unit test verifies template uses runtime arch detection (TestNVDriverTemplate_CUDARepoArch)
• go test ./pkg/provisioner/templates/... passes
• golangci-lint run ./... passes (0 issues)
• CI passes

[Copilot]

Pull request overview

This PR updates the NVIDIA driver provisioning template to support ARM64 by making the CUDA APT repository URL architecture dynamic at runtime, and adds unit coverage to prevent regressions in that area.

Changes:

• Replace hardcoded x86_64 in the CUDA repo URL with a runtime uname -m-based architecture variable.
• Map aarch64 to sbsa to match NVIDIA’s ARM server CUDA repo naming.
• Add/extend unit tests to assert the template no longer hardcodes x86_64 and includes the new arch handling logic.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
pkg/provisioner/templates/nv-driver.go	Adds runtime CUDA repo arch detection and uses it in the NVIDIA CUDA keyring download URL.
pkg/provisioner/templates/nv-driver_test.go	Adds assertions to ensure the template doesn’t hardcode x86_64 and validates the new arch logic.

[Copilot]

The CUDA repo arch mapping only handles aarch64 -> sbsa. In this codebase, other templates treat uname -m as potentially returning arm64 as well (e.g., container-toolkit template maps aarch64|arm64). If uname -m returns arm64 here, the URL will become .../arm64/... which NVIDIA's CUDA repos typically don't provide for server ARM (they use sbsa), causing a 404 and breaking driver install on some arm64 environments. Consider normalizing with a case and mapping both aarch64 and arm64 to sbsa (and update the new unit test accordingly).

Suggested change

	if [[ "$CUDA_ARCH" == "aarch64" ]]; then
	CUDA_ARCH="sbsa"
	fi
	case "$CUDA_ARCH" in
	aarch64|arm64)
	CUDA_ARCH="sbsa"
	;;
	esac

[ArangoGutierrez]

/retest

[coveralls]

Pull Request Test Coverage Report for Build 21986731653

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 47.501%

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Totals
Change from base Build 21955389842:	0.0%
Covered Lines:	2500
Relevant Lines:	5263

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💛 - Coveralls