Add --log-format json option #5482

Job	Run time
Integration tests	14m 29s
Colima (v0.6.5)	4m 43s
Integration tests (on Linux) (alpine.yaml)	2m 54s
Lints	2m 55s
Integration tests (on Linux) (debian.yaml)	3m 50s
Integration tests (on Linux) (fedora.yaml)	3m 44s
Unit tests (1.22.x)	5m 27s
VMNet test	12m 15s
Integration tests (on Linux) (archlinux.yaml)	5m 3s
Unit tests (1.23.x)	1m 52s
Integration tests (on Linux) (opensuse.yaml)	4m 39s
Integration tests (on Linux) (experimental/net-user-v2.yaml)	4m 3s
Windows tests	5m 24s
Integration tests (on Linux) (experimental/9p.yaml)	5m 54s
Integration tests (on Linux) (docker.yaml)	4m 26s
Upgrade test (v0.15.1)	12m 57s
Integration tests (on Linux) (../hack/test-templates/alpine-9p-writable.yaml)	2m 43s
Integration tests (on Linux) (../hack/test-templates/test-misc.yaml)	16m 22s
vz (default.yaml)	26m 59s
vz (fedora.yaml)	11m 17s
	2h 31m 56s

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