Enhance ioredis samples for token refresh use cases

[samsaha-ms]

Hello,
We request to enhance the ioredis samples here to better support the token refresh scenario along with clustered caches. Following are two asks we have:

1. Current sample here https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/identity/identity/samples/AzureCacheForRedis/ioredis.md#migration-guidance-2, does not update the redis client object password field with new token after token refresh. This can be done by adding redis.options.password = accessTokenCache.token to update password with new token in client object as well after this line inside updateToken() function.
2. Add a separate sample for clustered caches for token refresh. For clustered caches, we need to loop over each client node object and update password with new token and send auth command. Example can be found below.
   

[github-actions]

@KarishmaGhiya @maorleger

[github-actions]

Thank you for your feedback. Tagging and routing to the team member best able to assist.