These fields aren't used for any observability/diagnosability purpose, and we should remove them as in some cases it's creating a lot of entries in the query stats store.

```
key.client.os
key.client.os.type
key.client.os.name
key.client.os.architecture
key.client.os.version
```

We would have to update docs, and send out comms to customers using the output of query stats on EA, as well as check