Bump github.com/spf13/cobra from 1.7.0 to 1.8.0 #2908

Job	Run time
unit	2m 52s
unit	2m 52s
e2e (v1.25.11)	26m 11s
e2e (v1.25.11)	42m 10s
test-docker-build (base)	46s
test-docker-build (base)	46s
e2e (v1.28.0)	34m 52s
e2e (v1.28.0)	26m 6s
integration (v1.25.11)	25m 8s
integration (v1.25.11)	25m 8s
test-docker-build (git)	1m 46s
test-docker-build (git)	1m 46s
integration (v1.28.0)	24m 54s
integration (v1.28.0)	24m 54s
test-docker-build (image-processing)	47s
test-docker-build (image-processing)	47s
test-docker-build (waiter)	43s
test-docker-build (waiter)	43s
	4h 3m 11s

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