Add Lua global variables library #4888

Job	Run time
Windows (Debug, MSVC, Win32)	16m 38s
Linux (Debug, gcc-9)	9m 56s
Mac (Debug, clang, x86_64)	8m 27s
Windows (Debug, MSVC, x64)	16m 19s
Linux (Debug, gcc-13)	8m 14s
Windows (Release, MSVC, Win32)	19m 29s
Mac (Debug, clang, arm64)	9m 39s
Linux (Debug, clang-16)	9m 51s
Windows (Release, MSVC, x64)	21m 0s
Linux (Release, gcc-9)	9m 53s
Mac (Release, clang, x86_64)	9m 2s
Linux (Release, gcc-13)	7m 48s
Mac (Release, clang, arm64)	6m 51s
Linux (Release, clang-16)	9m 53s
Linux (Debug, gcc-13, -DFSO_BUILD_WITH_OPENGL=OFF -DFSO_BUILD_WITH_VULKAN=OFF)	2m 15s
Linux (Release, gcc-13, -DFSO_BUILD_WITH_OPENGL=OFF -DFSO_BUILD_WITH_VULKAN=OFF)	6m 51s
	2h 52m 6s

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