iso: pin NVIDIA driver/DCGM to DGX OS 7.5.0-validated combo

590.48.01/DCGM 4.6.0-1 was never a deliberate compatibility choice — the
driver version traces back to a CDN 404 on the originally pinned
550.54.15 (commit 559fc29), and DCGM was bumped twice since purely
because NVIDIA pulled the previously-pinned core package from the repo
(6dee8f3, b2e177a). The 590 branch only has two point releases so far,
and its nvvs plugin fails dcgmi diag with "Detected driver major
version 0 is not between the required versions 346 and 2000" on H100 —
confirmed via a staging support bundle.

Switch to 580.126.20 / DCGM 4.5.2-1, the combo NVIDIA's own DGX OS 7.5.0
release notes validate for H100. Both packages confirmed present in the
NVIDIA CUDA debian12/x86_64 apt repo.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

iso/builder/config/package-lists/bee-nvidia.list.chroot

@@ -2,7 +2,7 @@
 # Validate uses dcgmi diagnostics; Burn uses dcgmproftester as the official
 # NVIDIA max-compute recipe. The smoketest/runtime contract treats
 # dcgmproftester as required in the LiveCD.
-# DCGM 4 is packaged per CUDA major. The image ships NVIDIA driver 590 with
+# DCGM 4 is packaged per CUDA major. The image ships NVIDIA driver 580 with
 # CUDA 13 userspace, so install the CUDA 13 build plus proprietary components
 # explicitly.
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