[Website]: Add no shard available exception to the sympthoms of lack of permissions

### Type of issue

None

### What documentation page is affected

https://www.elastic.co/docs/troubleshoot/elasticsearch/remote-clusters

### What happened?

While troubleshooting a case, a user was experiencing no shards available:

And the reason was lack of permissions with the user it was running the query

### Additional info

_No response_

### triage notes

[sr]
want to either add a procedure validating permissions or make permissions a prereq for troubleshooting