vendor: update go-oidc

This change updates the github.com/coreos/go-oidc package.

Notable changes:

- Throw out JWTs with invalid claims early (coreos/go-oidc#97, brougt up in #30457)
- Remove the capnslog dependency (coreos/go-oidc#95)
- Support for Azure AD oddities (coreos/go-oidc#87)

vendor/github.com/coreos/go-oidc/http/http.go

@@ -4,18 +4,13 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"errors"
+	"log"
 	"net/http"
 	"net/url"
 	"path"
 	"strconv"
 	"strings"
 	"time"
-
-	"github.com/coreos/pkg/capnslog"
-)
-
-var (
-	log = capnslog.NewPackageLogger("github.com/coreos/go-oidc", "http")
 )
 
 func WriteError(w http.ResponseWriter, code int, msg string) {
@@ -26,7 +21,9 @@ func WriteError(w http.ResponseWriter, code int, msg string) {
 	}
 	b, err := json.Marshal(e)
 	if err != nil {
-		log.Errorf("Failed marshaling %#v to JSON: %v", e, err)
+		log.Printf("go-oidc: failed to marshal %#v: %v", e, err)
+		code = http.StatusInternalServerError
+		b = []byte(`{"error":"server_error"}`)
 	}
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(code)

vendor/github.com/coreos/go-oidc/http/middleware.go

@@ -1,14 +0,0 @@
-package http
-
-import (
-	"net/http"
-)
-
-type LoggingMiddleware struct {
-	Next http.Handler
-}
-
-func (l *LoggingMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	log.Infof("HTTP %s %v", r.Method, r.URL)
-	l.Next.ServeHTTP(w, r)
-}