When creating alerts from insights it does not use the renamed series name

[darkopia]

Bug Description

Bug description

Please describe.
When creating an alert from an insight where the series have been renamed, the series selection on the alert does not show the renamed series. This can be problematic if there are many series based on the same event with filters.

How to reproduce

1. Create an insight with a series. e.g. trend
2. Rename the series
3. Create and alert and select the series
4. Notice that the event name is used, not the series name.

Additional context

Possible workaround is to create actions instead of filtered events

Debug info

- [ ] PostHog Cloud, Debug information: [please copy/paste from https://us.posthog.com/settings/project-details#variables or https://eu.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]