CI: create separate artifacts for macos-{13,14,15} #5985

Job	Run time
Colima (v0.6.5)	7m 5s
Integration tests	13m 27s
Lints	41s
Integration tests (on Linux) (alpine.yaml)	6m 25s
Spell check	8s
Integration tests (on Linux) (debian.yaml)	6m 27s
Unit tests (1.22.x)	45s
Integration tests (on Linux) (fedora.yaml)	6m 52s
Upgrade test (v0.15.1)	12m 58s
VMNet test	11m 40s
Integration tests (on Linux) (opensuse.yaml)	8m 59s
Integration tests (on Linux) (docker.yaml)	18m 9s
Unit tests (1.23.x)	4m 12s
vz (default.yaml)	10m 21s
Integration tests (on Linux) (../hack/test-templates/alpine-iso-9p-writable.yaml)	5m 50s
Windows tests	4m 27s
vz (fedora.yaml)	9m 19s
Integration tests (on Linux) (../hack/test-templates/net-user-v2.yaml)	7m 50s
Integration tests (on Linux) (../hack/test-templates/test-misc.yaml)	20m 12s
	2h 35m 47s

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