Experiment results timeout shows wrong empty state

[jurajmajerik]

Bug Description

Bug description

When a results query times out, we show "No results" instead of a proper timeout message.

How to reproduce

This sometimes happens on experiments with a large number of participants, e.g. here https://us.posthog.com/project/2/experiments/30325

Additional context

Debug info

- [ ] PostHog Cloud, Debug information: [please copy/paste from https://us.posthog.com/settings/project-details#variables]
- [ ] PostHog Hobby self-hosted with `docker compose`, version/commit: [please provide]
- [ ] PostHog self-hosted with Kubernetes (deprecated, see [`Sunsetting Kubernetes support`](https://posthog.com/blog/sunsetting-helm-support-posthog)), version/commit: [please provide]