Support building of loadtest apps with locally installed dependencies #404

Job	Run time
windows (windows-latest, v143, x64, Debug,Release, ON, ON, OpenGL+Vulkan, ON, ON, ON, YES, ON, OFF)	32m 30s
windows (windows-latest, v143, x64, Release, OFF, OFF, OFF, OFF, OFF, NO, OFF, OFF)	5m 17s
windows (windows-latest, v143, x64, Release, OFF, OFF, OFF, OFF, OFF, NO, OFF, ON)	6m 4s
windows (windows-latest, v143, x64, Release, OFF, OFF, OFF, OFF, OFF, NO, ON, ON)	4m 44s
windows (windows-latest, CLangCL, x64, Debug,Release, ON, ON, OpenGL+Vulkan, ON, ON, ON, YES, ON,...	32m 42s
windows (windows-latest, CLangCL, x64, Release, OFF, OFF, OFF, OFF, OFF, NO, OFF, OFF)	7m 43s
windows (windows-latest, CLangCL, x64, Release, OFF, OFF, OFF, OFF, OFF, NO, OFF, ON)	7m 9s
windows (windows-latest, CLangCL, x64, Release, OFF, OFF, OFF, OFF, OFF, NO, ON, ON)	6m 33s
windows (windows-2019, v142, x64, Debug,Release, ON, ON, OpenGL+Vulkan, ON, ON, ON, NO, ON, OFF, ...	27m 19s
windows (windows-latest, CLangCL, arm64, Debug,Release, ON, ON, OFF, ON, ON, ON, YES, Visual Stud...	17m 8s
	2h 27m 9s

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