Bump k8s.io/client-go from 0.31.3 to 0.32.1 in /tests #12069

Job	Run time
setup-environment	1m 40s
gofmt	1m 51s
tidy	2m 21s
coverage	1m 31s
cross-compile (binaries-darwin_amd64)	5m 25s
cross-compile (binaries-darwin_arm64)	5m 30s
generate-metrics	1m 33s
cross-compile (binaries-linux_amd64)	5m 1s
lint	9m 24s
cross-compile (binaries-linux_arm64)	5m 20s
test	6m 53s
cross-compile (binaries-windows_amd64)	5m 0s
cross-compile (binaries-linux_ppc64le)	4m 52s
	56m 21s

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