Vulkan: do not replace hardware GPU with software renderer#781

IgorAlexey wants to merge 3 commits intoDiligentGraphics:masterDiligentGraphics/DiligentCore:masterfrom

IgorAlexey:fix-vulkan-iGPU-llvmpipe-selectionIgorAlexey/DiligentCore:fix-vulkan-iGPU-llvmpipe-selectionCopy head branch name to clipboard