CI: create separate artifacts for macos-{13,14,15} #5988

Job	Run time
Integration tests	13m 2s
Colima (v0.6.5)	6m 54s
Integration tests (on Linux) (alpine.yaml)	8m 19s
Lints	2m 20s
Integration tests (on Linux) (debian.yaml)	6m 47s
Spell check	20s
Integration tests (on Linux) (fedora.yaml)	6m 43s
Unit tests (1.22.x)	45s
Upgrade test (v0.15.1)	12m 8s
Integration tests (on Linux) (opensuse.yaml)	8m 5s
Unit tests (1.23.x)	4m 7s
VMNet test	10m 38s
Integration tests (on Linux) (docker.yaml)	12m 6s
vz (default.yaml)	10m 22s
Windows tests	3m 53s
vz (fedora.yaml)	9m 38s
Integration tests (on Linux) (../hack/test-templates/alpine-iso-9p-writable.yaml)	6m 25s
Integration tests (on Linux) (../hack/test-templates/net-user-v2.yaml)	10m 28s
Integration tests (on Linux) (../hack/test-templates/test-misc.yaml)	20m 3s
	2h 33m 3s

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