Add automated upgrade workflow for halide-llvm (#8948) #1138

Job	Run time
Build Halide wheels for macosx_x86_64	44m 3s
Build Halide wheels for macosx_arm64	35m 31s
Build Halide wheels for win_amd64	1h 37m 22s
Build Halide wheels for manylinux_x86_64	48m 45s
Publish on PyPI	1m 35s
	3h 47m 16s

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