update dependencies to 1.21

This change updates the go.mod and related vendor files to the
kubernetes 1.21 baseline. This was achieved by updating some of the
entries in go.mod and then running `make vendor`.

The updates to go.mod were as follows:
github.com/openshift/api master
github.com/openshift/client-go master
github.com/openshift/library-go master
k8s.io/kubectl v0.21.0
sigs.k8s.io/controller-runtime 0.9.0-alpha.1

Then ran `make vendor` to produce the update.

go.mod

@@ -5,37 +5,38 @@ go 1.13
 require (
 	github.com/MakeNowJust/heredoc v1.0.0 // indirect
 	github.com/blang/semver v3.5.1+incompatible
+	github.com/go-logr/logr v0.4.0
 	github.com/gobuffalo/flect v0.2.2 // indirect
-	github.com/go-logr/logr v0.3.0
 	github.com/google/gofuzz v1.1.0
 	github.com/google/uuid v1.1.2
 	github.com/mattn/go-isatty v0.0.12 // indirect
-	github.com/onsi/ginkgo v1.14.1
-	github.com/onsi/gomega v1.10.2
-	github.com/openshift/api v0.0.0-20201216151826-78a19e96f9eb
-	github.com/openshift/client-go v0.0.0-20201214125552-e615e336eb49
+	github.com/onsi/ginkgo v1.15.0
+	github.com/onsi/gomega v1.10.5
+	github.com/openshift/api v0.0.0-20210412212256-79bd8cfbbd59
+	github.com/openshift/client-go v0.0.0-20210409155308-a8e62c60e930
 	github.com/openshift/cluster-api-provider-gcp v0.0.1-0.20201201000827-1117a4fc438c
-	github.com/openshift/library-go v0.0.0-20201215165635-4ee79b1caed5
+	github.com/openshift/library-go v0.0.0-20210408164723-7a65fdb398e2
 	github.com/operator-framework/operator-sdk v0.5.1-0.20190301204940-c2efe6f74e7b
-	github.com/prometheus/client_golang v1.7.1
+	github.com/prometheus/client_golang v1.9.0
 	github.com/spf13/cobra v1.1.1
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.6.1
 	github.com/vmware/govmomi v0.22.2
-	golang.org/x/net v0.0.0-20201110031124-69a78807bb2b
+	golang.org/x/net v0.0.0-20210224082022-3d97a244fca7
 	gopkg.in/gcfg.v1 v1.2.3
-	k8s.io/api v0.20.0
-	k8s.io/apimachinery v0.20.0
-	k8s.io/apiserver v0.20.0
-	k8s.io/client-go v0.20.0
-	k8s.io/code-generator v0.20.0
-	k8s.io/klog/v2 v2.4.0
-	k8s.io/kubectl v0.20.0
-	k8s.io/utils v0.0.0-20201110183641-67b214c5f920
+	k8s.io/api v0.21.0
+	k8s.io/apimachinery v0.21.0
+	k8s.io/apiserver v0.21.0
+	k8s.io/client-go v0.21.0
+	k8s.io/code-generator v0.21.0
+	k8s.io/klog/v2 v2.8.0
+	k8s.io/kubectl v0.21.0
+	k8s.io/utils v0.0.0-20210111153108-fddb29f9d009
 	sigs.k8s.io/cluster-api-provider-aws v0.0.0-00010101000000-000000000000
 	sigs.k8s.io/cluster-api-provider-azure v0.0.0-00010101000000-000000000000
-	sigs.k8s.io/controller-runtime v0.7.0
+	sigs.k8s.io/controller-runtime v0.9.0-alpha.1.0.20210413130450-7ef2da0bc161
 	sigs.k8s.io/controller-tools v0.3.0
+	sigs.k8s.io/structured-merge-diff/v4 v4.1.1 // indirect
 	sigs.k8s.io/yaml v1.2.0
 )