make LRU cache global for internode tokens (#19555)

cmd/jwt_test.go

@@ -22,7 +22,6 @@ import (
 	"net/http"
 	"os"
 	"testing"
-	"time"
 
 	jwtgo "github.com/golang-jwt/jwt/v4"
 	xjwt "github.com/minio/minio/internal/jwt"
@@ -181,11 +180,11 @@ func BenchmarkAuthenticateNode(b *testing.B) {
 		}
 	})
 	b.Run("cached", func(b *testing.B) {
-		fn := cachedAuthenticateNode(time.Second)
+		fn := newCachedAuthToken()
 		b.ResetTimer()
 		b.ReportAllocs()
 		for i := 0; i < b.N; i++ {
-			fn(creds.AccessKey, creds.SecretKey, "aud")
+			fn("aud")
 		}
 	})
 }