Implement parts of `LegoCarBuild` and dependents #4518

Job	Run time
MSVC 4.20	1m 23s
Current MSVC	2m 8s
Current msys2 mingw32	4m 3s
Current msys2 clang32	5m 10s
Download original binaries / fetch	2s
Compare with master	1m 34s
Upload artifacts	0s
	14m 20s

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