CI: Downgrade to qemu-8.2.1 #5640

Job	Run time
Windows tests	2m 25s
Integration tests	12m 39s
Unit tests (1.22.x)	54s
Integration tests (on Linux) (alpine.yaml)	5m 44s
Unit tests (1.23.x)	4m 10s
Integration tests (on Linux) (debian.yaml)	6m 31s
Colima (v0.6.5)	7m 24s
Integration tests (on Linux) (fedora.yaml)	6m 29s
Integration tests (on Linux) (archlinux.yaml)	8m 0s
Lints	1m 40s
Upgrade test (v0.15.1)	25m 33s
Integration tests (on Linux) (opensuse.yaml)	7m 38s
Integration tests (on Linux) (experimental/net-user-v2.yaml)	7m 19s
VMNet test	11m 10s
vz (default.yaml)	12m 33s
Integration tests (on Linux) (experimental/9p.yaml)	6m 32s
vz (fedora.yaml)	14m 17s
Integration tests (on Linux) (docker.yaml)	16m 43s
Integration tests (on Linux) (../hack/test-templates/alpine-9p-writable.yaml)	5m 20s
Integration tests (on Linux) (../hack/test-templates/test-misc.yaml)	19m 10s
	3h 2m 11s

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