Bump k8s.io/client-go

Bumps [k8s.io/client-go](https://github.com/kubernetes/client-go) from 0.0.0-20190823012814-cdbd92c111cf to 0.20.0-alpha.2.
- [Release notes](https://github.com/kubernetes/client-go/releases)
- [Commits](https://github.com/kubernetes/client-go/commits/v0.20.0-alpha.2)

---
updated-dependencies:
- dependency-name: k8s.io/client-go
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -4,25 +4,17 @@ go 1.16
 
 require (
 	github.com/container-storage-interface/spec v1.5.0
-	github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 // indirect
-	github.com/golang/protobuf v1.3.2
-	github.com/googleapis/gnostic v0.3.0 // indirect
-	github.com/hashicorp/golang-lru v0.5.1 // indirect
+	github.com/golang/protobuf v1.4.2
 	github.com/kubernetes-csi/csi-lib-utils v0.6.1
 	github.com/prometheus/client_golang v1.1.0 // indirect
 	github.com/yunify/qingcloud-sdk-go v0.0.0-20230406022709-e32d107bcab7
-	golang.org/x/net v0.0.0-20190812203447-cdfb69ac37fc
-	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 // indirect
-	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 // indirect
-	google.golang.org/appengine v1.6.1 // indirect
-	google.golang.org/grpc v1.26.0
-	gopkg.in/inf.v0 v0.9.1 // indirect
+	golang.org/x/net v0.0.0-20200707034311-ab3426394381
+	google.golang.org/grpc v1.27.0
 	k8s.io/apiextensions-apiserver v0.0.0-20190823014223-07b4561f8b0e // indirect
-	k8s.io/apimachinery v0.0.0-20190823012420-8ca64af22337
+	k8s.io/apimachinery v0.20.0-alpha.2
 	k8s.io/apiserver v0.0.0-20190823053033-1316076af51c // indirect
-	k8s.io/client-go v0.0.0-20190823012814-cdbd92c111cf
+	k8s.io/client-go v0.20.0-alpha.2
 	k8s.io/cloud-provider v0.0.0-20191212015549-86a326830157 // indirect
 	k8s.io/klog v0.4.0
-	k8s.io/kube-openapi v0.0.0-20190718094010-3cf2ea392886 // indirect
 	k8s.io/kubernetes v1.14.1
 )