[DevTools] Track suspensey CSS on "suspended by" (#34166)

We need to track that Suspensey CSS (Host Resources) can contribute to
the loading state. We can pick up the start/end time from the
Performance Observer API since we know which resource was loaded.

If DOM nodes are not filtered there's a link to the `<link>` instance.
The `"awaited by"` stack is the callsite of the JSX creating the
`<link>`.

<img width="591" height="447" alt="Screenshot 2025-08-11 at 1 35 21 AM"
src="https://github.com/user-attachments/assets/63af0ca9-de8d-4c74-a797-af0a009b5d73"
/>

Inspecting the link itself:

<img width="592" height="344" alt="Screenshot 2025-08-11 at 1 31 43 AM"
src="https://github.com/user-attachments/assets/89603dbc-6721-4bbf-8b58-6010719b29e3"
/>

In this approach I only include it if the page currently matches the
media query. It might contribute in some other scenario but we're not
showing every possible state but every possible scenario that might
suspend if timing changes in the current state.