CI: Add macos-universal-10.15 to some targets, add mod bootstrap #240

Job	Run time
common (linux-aarch64, apt, ubuntu-22.04, linux-aarch64)	1m 54s
cardinal (linux-aarch64, apt, ubuntu-20.04, linux-aarch64)	4m 40s
common (linux-armhf, apt, ubuntu-22.04, linux-armhf)	1m 44s
cardinal (linux-armhf, apt, ubuntu-20.04, linux-armhf)	3m 14s
common (linux-i686, apt, ubuntu-22.04, linux-i686)	1m 58s
cardinal (linux-i686, apt, ubuntu-20.04, linux-i686)	3m 55s
common (linux-riscv64, apt, ubuntu-22.04, linux-riscv64)	1m 47s
cardinal (linux-riscv64, apt, ubuntu-20.04, linux-riscv64)	3m 11s
common (linux-x86_64, apt, ubuntu-22.04, linux-x86_64)	1m 28s
cardinal (linux-x86_64, apt, ubuntu-20.04, linux-x86_64)	3m 4s
common (macos, homebrew, macos-11, macos)	23s
cardinal (macos, homebrew, macos-11, macos)	24s
common (macos-universal, homebrew, macos-11, macos-universal)	27s
cardinal (macos-universal-10.15, homebrew, macos-11, macos-universal-10.15)	12m 46s
common (macos-universal-10.15, homebrew, macos-11, macos-universal-10.15)	1m 56s
cardinal (wasm, apt, ubuntu-22.04, wasm)	1m 51s
common (wasm, apt, ubuntu-22.04, wasm)	1m 18s
cardinal (win32, apt, ubuntu-22.04, win32)	2m 30s
common (win32, apt, ubuntu-22.04, win32)	1m 16s
cardinal (win64, apt, ubuntu-22.04, win64)	3m 16s
common (win64, apt, ubuntu-22.04, win64)	1m 26s
jack2	0s
plugins	0s
qt	0s
carla	0s
modaudio	0s
	54m 28s

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