fix createCluster - copy options.defaults.socket before modifying it (#2783)

* shallow copy of this.#options.defaults.socket

* shallow copy of this.#options.defaults.socket

* nit

---------

Co-authored-by: Max Gruenfelder <maximilian.gruenfelder@sap.com>
Co-authored-by: Leibale Eidelman <me@leibale.com>

Author: soccermax

packages/client/lib/cluster/cluster-slots.ts

@@ -269,10 +269,10 @@ export default class RedisClusterSlots<
         if (this.#options.defaults) {
             let socket;
             if (this.#options.defaults.socket) {
-                socket = options?.socket ? {
+                socket = {
                     ...this.#options.defaults.socket,
-                    ...options.socket
-                } : this.#options.defaults.socket;
+                    ...options?.socket
+                };
             } else {
                 socket = options?.socket;
             }