[Website]: From which version is execution_context.enabled available?

### Type of issue

None

### What documentation page is affected

https://www.elastic.co/docs/docs/reference/kibana/configuration-reference/general-settings

### What happened?

Looking at the documentation, it is not clear from which version this feature is available.
I cannot find any relevant information in the release notes.
Does this mean it is only available in Elastic Cloud 8.1.0 (ECH)?

```
execution_context.enabled logo cloud
Propagate request-specific metadata to Elasticsearch server by way of the x-opaque-id header. It is available in Elastic Cloud 8.1.0 and later versions.
```

### Additional info

_No response_