Fix missing binfmt for image CI #19

Job	Run time
test-deploy	7m 35s
test-image (cos.plain.x86_64.warewulf.tar)	2m 50s
test-image (cos.lt.x86_64.warewulf.tar)	2m 54s
test-image (cos.ml.x86_64.warewulf.tar)	3m 28s
test-image (cos.plain.aarch64.warewulf.tar)	24s
test-image (cos.lt.aarch64.warewulf.tar)	44s
test-image (cos.ml.aarch64.warewulf.tar)	45s
test-image (cos.plain_cuda.x86_64.warewulf.tar)	5m 30s
test-image (cos.ml_cuda.x86_64.warewulf.tar)	6m 4s
test-image (cos.lt_cuda.x86_64.warewulf.tar)	5m 54s
test-image (cos.plain_cuda.aarch64.warewulf.tar)	29s
test-image (cos.ml_cuda.aarch64.warewulf.tar)	25s
test-image (cos.lt_cuda.aarch64.warewulf.tar)	27s
test-image (cos.plain_rocm.x86_64.warewulf.tar)	7m 34s
test-image (cos.ml_rocm.x86_64.warewulf.tar)	4m 58s
test-image (cos.lt_rocm.x86_64.warewulf.tar)	7m 35s
test-image (cos.el8.aarch64.warewulf.tar)	28s
	58m 4s

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