Update disconnected MSIX Packaging Tool setup

[Roy (RDMacLachlan)]

Summary

• corrects provisioning commands for a running OS and a mounted Windows image
• distinguishes disconnected installation from offline image servicing
• replaces obsolete driver downloads with matching Features on Demand media guidance
• updates DISM, volume licensing, Visual Studio subscription, and OEM instructions

Reviewed for technical accuracy by Howard Bot.

Fixes AB#36637689

[learn-build-service-prod]

Learn Build status updates of commit e869c4b:

❌ Validation status: errors

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[learn-build-service-prod]

Learn Build status updates of commit 67e47db:

✅ Validation status: passed

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