build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/k8s.io/apiserver/pkg/authentication/user/doc.go

@@ -0,0 +1,19 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package user contains utilities for dealing with simple user exchange in the auth
+// packages. The user.Info interface defines an interface for exchanging that info.
+package user // import "k8s.io/apiserver/pkg/authentication/user"

e2e/vendor/k8s.io/apiserver/pkg/authentication/user/user.go

@@ -0,0 +1,88 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package user
+
+// Info describes a user that has been authenticated to the system.
+type Info interface {
+	// GetName returns the name that uniquely identifies this user among all
+	// other active users.
+	GetName() string
+	// GetUID returns a unique value for a particular user that will change
+	// if the user is removed from the system and another user is added with
+	// the same name.
+	GetUID() string
+	// GetGroups returns the names of the groups the user is a member of
+	GetGroups() []string
+
+	// GetExtra can contain any additional information that the authenticator
+	// thought was interesting.  One example would be scopes on a token.
+	// Keys in this map should be namespaced to the authenticator or
+	// authenticator/authorizer pair making use of them.
+	// For instance: "example.org/foo" instead of "foo"
+	// This is a map[string][]string because it needs to be serializeable into
+	// a SubjectAccessReviewSpec.authorization.k8s.io for proper authorization
+	// delegation flows
+	// In order to faithfully round-trip through an impersonation flow, these keys
+	// MUST be lowercase.
+	GetExtra() map[string][]string
+}
+
+// DefaultInfo provides a simple user information exchange object
+// for components that implement the UserInfo interface.
+type DefaultInfo struct {
+	Name   string
+	UID    string
+	Groups []string
+	Extra  map[string][]string
+}
+
+func (i *DefaultInfo) GetName() string {
+	return i.Name
+}
+
+func (i *DefaultInfo) GetUID() string {
+	return i.UID
+}
+
+func (i *DefaultInfo) GetGroups() []string {
+	return i.Groups
+}
+
+func (i *DefaultInfo) GetExtra() map[string][]string {
+	return i.Extra
+}
+
+const (
+	// well-known user and group names
+	SystemPrivilegedGroup = "system:masters"
+	NodesGroup            = "system:nodes"
+	MonitoringGroup       = "system:monitoring"
+	AllUnauthenticated    = "system:unauthenticated"
+	AllAuthenticated      = "system:authenticated"
+
+	Anonymous     = "system:anonymous"
+	APIServerUser = "system:apiserver"
+
+	// core kubernetes process identities
+	KubeProxy             = "system:kube-proxy"
+	KubeControllerManager = "system:kube-controller-manager"
+	KubeScheduler         = "system:kube-scheduler"
+
+	// CredentialIDKey is the key used in a user's "extra" to specify the unique
+	// identifier for this identity document).
+	CredentialIDKey = "authentication.kubernetes.io/credential-id"
+)