Revert "CA-115031: Allow emulated vGPUs if IOMMU is disabled"

This reverts commit e1ce293266af3193defa17464db3c1977617e90e.
Revert "Rename some vGPU release parameter variables to avoid future confusion"

This reverts commit c51823dc8e8a0b49cd85a4aab0b6bac6f4c22a36.
Merge pull request #1505 from johnelse/revert-for-hotfix

Revert changes since the tech preview hotfix build