`docker{,-rootful}.yaml`: Use param in docker templates #5246

Job	Run time
Windows tests	4m 13s
Integration tests	37m 19s
Colima (v0.6.5)	6m 22s
Integration tests (on Linux) (alpine.yaml)	5m 14s
Lints	1m 38s
Integration tests (on Linux) (debian.yaml)	5m 59s
Unit tests (1.21.x)	48s
Integration tests (on Linux) (fedora.yaml)	6m 14s
Upgrade test (v0.15.1)	10m 47s
Unit tests (1.22.x)	3m 36s
Integration tests (on Linux) (archlinux.yaml)	7m 34s
Integration tests (on Linux) (opensuse.yaml)	7m 29s
VMNet test	23m 13s
vz (experimental/vz.yaml)	12m 19s
Integration tests (on Linux) (experimental/net-user-v2.yaml)	6m 43s
vz (fedora.yaml)	10m 19s
Integration tests (on Linux) (experimental/9p.yaml)	6m 39s
Integration tests (on Linux) (docker.yaml)	6m 44s
Integration tests (on Linux) (../hack/test-templates/alpine-9p-writable.yaml)	4m 17s
Integration tests (on Linux) (../hack/test-templates/test-misc.yaml)	18m 41s
	3h 6m 8s

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