[RAC][Metrics UI] Link inventory threshold alerts to a specific timestamp in the metrics app

[afgomez]

Summary

Closes #106497

I've added a new /metrics/link-to handler to allow linking to a specific timestamp in the inventory app, and used it in the alert formatter to link to the @timestamp. The link generation is naive. I appreciate if someone from the metrics part of @elastic/logs-metrics-ui could give me pointers on how to generate that link.

I've made the assumption that the user will be interested in the point in time where the alert has changed. For example if the alert is resolved, we link to the resolution timestamp. If this assumption is incorrect please let me know.

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: d0f0fdd
• Storybooks Preview

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
infra	971	972	+1

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
infra	1.7MB	1.7MB	+1.1KB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
infra	150.4KB	150.4KB	+56.0B

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[afgomez]

Superseeded by #113553