Don't clone QEMU submodules #8

Job	Run time
Test installation for ubuntu-20.04	3h 17m 38s
Test installation for ubuntu-22.04	3h 12m 57s
Test installation for ubuntu-24.04	3h 30m 5s
Test installation for rocky-8	3h 18m 11s
Test installation for rocky-9	3h 25m 55s
Test installation for almalinux-8	3h 12m 39s
Test installation for almalinux-9	3h 27m 23s
Test installation for user-install	3h 16m 8s
Test installation for custom-install	3h 9m 44s
Test installation for custom-user-install	3h 13m 31s
	1d 9h 4m 11s

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