Update go-qcow2reader to 0.6.0 #6359

Job	Run time
Colima (v0.6.5)	14m 46s
Integration tests	17m 52s
Integration tests (on Linux) (alpine.yaml)	6m 41s
Lints	4m 56s
Integration tests (on Linux) (debian.yaml)	7m 44s
Integration tests (on Linux) (fedora.yaml)	7m 22s
Spell check	11s
Integration tests (on Linux) (archlinux.yaml)	8m 35s
Integration tests (on Linux) (opensuse.yaml)	9m 34s
Unit tests (1.22.x)	5m 52s
Integration tests (on Linux) (docker.yaml)	8m 11s
Unit tests (1.23.x)	5m 27s
Integration tests (on Linux) (../hack/test-templates/alpine-iso-9p-writable.yaml)	6m 5s
Integration tests (on Linux) (../hack/test-templates/net-user-v2.yaml)	8m 59s
Integration tests (on Linux) (../hack/test-templates/test-misc.yaml)	21m 37s
Upgrade test (v0.15.1)	16m 16s
VMNet test	15m 15s
vz (default.yaml, true)	13m 46s
vz (fedora.yaml, false)	13m 50s
Windows tests	6m 50s
	3h 19m 49s

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