rebase: bump k8s.io/kubernetes from 1.26.2 to 1.27.2

Bumps [k8s.io/kubernetes](https://github.com/kubernetes/kubernetes) from 1.26.2 to 1.27.2.
- [Release notes](https://github.com/kubernetes/kubernetes/releases)
- [Commits](https://github.com/kubernetes/kubernetes/compare/v1.26.2...v1.27.2)

---
updated-dependencies:
- dependency-name: k8s.io/kubernetes
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

vendor/k8s.io/apiserver/pkg/authentication/request/bearertoken/bearertoken.go

@@ -0,0 +1,76 @@
+/*
+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 bearertoken
+
+import (
+	"errors"
+	"net/http"
+	"strings"
+
+	"k8s.io/apiserver/pkg/authentication/authenticator"
+	"k8s.io/apiserver/pkg/warning"
+)
+
+const (
+	invalidTokenWithSpaceWarning = "the provided Authorization header contains extra space before the bearer token, and is ignored"
+)
+
+type Authenticator struct {
+	auth authenticator.Token
+}
+
+func New(auth authenticator.Token) *Authenticator {
+	return &Authenticator{auth}
+}
+
+var invalidToken = errors.New("invalid bearer token")
+
+func (a *Authenticator) AuthenticateRequest(req *http.Request) (*authenticator.Response, bool, error) {
+	auth := strings.TrimSpace(req.Header.Get("Authorization"))
+	if auth == "" {
+		return nil, false, nil
+	}
+	parts := strings.SplitN(auth, " ", 3)
+	if len(parts) < 2 || strings.ToLower(parts[0]) != "bearer" {
+		return nil, false, nil
+	}
+
+	token := parts[1]
+
+	// Empty bearer tokens aren't valid
+	if len(token) == 0 {
+		// The space before the token case
+		if len(parts) == 3 {
+			warning.AddWarning(req.Context(), "", invalidTokenWithSpaceWarning)
+		}
+		return nil, false, nil
+	}
+
+	resp, ok, err := a.auth.AuthenticateToken(req.Context(), token)
+	// if we authenticated successfully, go ahead and remove the bearer token so that no one
+	// is ever tempted to use it inside of the API server
+	if ok {
+		req.Header.Del("Authorization")
+	}
+
+	// If the token authenticator didn't error, provide a default error
+	if !ok && err == nil {
+		err = invalidToken
+	}
+
+	return resp, ok, err
+}