[AI Generated] BugFix: Use platform capability disk_count instead of vCPU/8 formula for NVMe count validation

[knelsonmeister]

Summary

The verify_nvme_basic test (step 4 of _verify_nvme_disk) unconditionally asserted that the NVMe namespace count equals ceil(vCPU / 8). This formula only applies to storage-optimized (L-series) VMs with NVMe Direct disks, but was applied to all Azure VMs — causing false failures on VMs like Standard_D4ds_v6 / Standard_D64ds_v6 where NVMe is used for remote/temp disks with different counts.

The fix replaces the hardcoded vCPU/8 formula with the platform-derived NvmeSettings.disk_count capability, which Azure computes from NvmeDiskSizeInMiB / NvmeSizePerDiskInMiB in the SKU data. This is correct for all VM types.

Validation Results

VM Size	Image	Result
Standard_L8s_v3	Canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest	PASSED
Standard_L80s_v3	Canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest	PASSED
Standard_D4ds_v6	Canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest	PASSED
Standard_D64ds_v6	Canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest	PASSED
Standard_D2s_v3	Canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest	SKIPPED (no NVMe — correct)

[github-actions]

✅ AI Test Selection — PASSED

7 test case(s) selected (view run)

Marketplace image: canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest

	Count
✅ Passed	7
❌ Failed	0
⏭️ Skipped	0
Total	7

Test case details

Test Case	Status	Time (s)	Message
verify_nvme_manage_ns (lisa_0_4)	✅ PASSED	16.622
verify_nvme_sriov_rescind (lisa_0_6)	✅ PASSED	11.593
verify_nvme_function_unpartitioned (lisa_0_3)	✅ PASSED	28.129
verify_nvme_function (lisa_0_2)	✅ PASSED	27.749
verify_nvme_basic (lisa_0_0)	✅ PASSED	11.258
verify_nvme_rescind (lisa_0_5)	✅ PASSED	10.316
verify_nvme_max_disk (lisa_0_1)	✅ PASSED	7.933

[knelsonmeister]

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