Adopt kubeadm and kubeproxy unit test after new config field added.

Fix proxy unit test

Author: RainbowMango

cmd/kubeadm/app/componentconfigs/kubeproxy_test.go

@@ -83,6 +83,7 @@ var kubeProxyMarshalCases = []struct {
 			nodePortAddresses: null
 			oomScoreAdj: null
 			portRange: ""
+			showHiddenMetricsForVersion: ""
 			udpIdleTimeout: 0s
 			winkernel:
 			  enableDSR: false
@@ -134,6 +135,7 @@ var kubeProxyMarshalCases = []struct {
 			nodePortAddresses: null
 			oomScoreAdj: null
 			portRange: ""
+			showHiddenMetricsForVersion: ""
 			udpIdleTimeout: 0s
 			winkernel:
 			  enableDSR: false

pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/after/__internal.yaml

@@ -32,6 +32,7 @@ Mode: ""
 NodePortAddresses: null
 OOMScoreAdj: null
 PortRange: ""
+ShowHiddenMetricsForVersion: ""
 UDPIdleTimeout: 0s
 Winkernel:
   EnableDSR: false

pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/after/v1alpha1.yaml

@@ -33,6 +33,7 @@ mode: ""
 nodePortAddresses: null
 oomScoreAdj: -999
 portRange: ""
+showHiddenMetricsForVersion: ""
 udpIdleTimeout: 250ms
 winkernel:
   enableDSR: false

pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/v1alpha1To__internal/empty.yaml.after_roundtrip

@@ -32,6 +32,7 @@ Mode: ""
 NodePortAddresses: null
 OOMScoreAdj: -999
 PortRange: ""
+ShowHiddenMetricsForVersion: ""
 UDPIdleTimeout: 250ms
 Winkernel:
   EnableDSR: false

pkg/proxy/apis/config/scheme/testdata/KubeProxyConfiguration/v1alpha1Tov1alpha1/empty.yaml.after_roundtrip

@@ -33,6 +33,7 @@ mode: ""
 nodePortAddresses: null
 oomScoreAdj: -999
 portRange: ""
+showHiddenMetricsForVersion: ""
 udpIdleTimeout: 250ms
 winkernel:
   enableDSR: false