When prerendering, emit culture name and use it on WebAssembly side

[SteveSandersonMS]

Inspired by #26890

If you’re prerendering a WebAssembly app, you’d never want the prerendered output to be in a different culture than the interactive version uses when it starts.

So when we emit the markers saying which components were prerendered, why not also include info about the culture that was used, and take it as the default on the client?

Then developers only have to be concerned about getting the server culture right to match user preference.

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