use istio client-go library instead of knative (#1661)

use istio client-go library instead of knative
bump kubernetes dependency version
change code coverage to codecov

vendor/istio.io/client-go/pkg/apis/config/v1alpha2/register.gen.go

@@ -0,0 +1,49 @@
+// Code generated by kubetype-gen. DO NOT EDIT.
+
+package v1alpha2
+
+import (
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+	schema "k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+var (
+	// Package-wide variables from generator "register".
+	SchemeGroupVersion = schema.GroupVersion{Group: GroupName, Version: "v1alpha2"}
+	SchemeBuilder      = runtime.NewSchemeBuilder(addKnownTypes)
+	localSchemeBuilder = &SchemeBuilder
+	AddToScheme        = localSchemeBuilder.AddToScheme
+)
+
+const (
+	// Package-wide consts from generator "register".
+	GroupName = "config.istio.io"
+)
+
+func Resource(resource string) schema.GroupResource {
+	return SchemeGroupVersion.WithResource(resource).GroupResource()
+}
+
+func addKnownTypes(scheme *runtime.Scheme) error {
+	scheme.AddKnownTypes(SchemeGroupVersion,
+		&AttributeManifest{},
+		&AttributeManifestList{},
+		&HTTPAPISpec{},
+		&HTTPAPISpecList{},
+		&HTTPAPISpecBinding{},
+		&HTTPAPISpecBindingList{},
+		&Handler{},
+		&HandlerList{},
+		&Instance{},
+		&InstanceList{},
+		&QuotaSpec{},
+		&QuotaSpecList{},
+		&QuotaSpecBinding{},
+		&QuotaSpecBindingList{},
+		&Rule{},
+		&RuleList{},
+	)
+	v1.AddToGroupVersion(scheme, SchemeGroupVersion)
+	return nil
+}