[Blazor] Update service-worker registration to prevent caching issues

[javiercn]

    I think we should change our templates to do `serviceWorker.register('...', { updateViaCache: 'none' })`

Originally posted by @javiercn in #39252 (comment)

We might also want to modernize the service worker and use ES modules (now supported) instead of plain scripts as they allow dependencies to be stated explicitly.

The fix is to change the registration https://github.com/dotnet/aspnetcore/blob/main/src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/wwwroot/index.html#L51

[guardrex]

WRT docs ... I'll resolve it for releases up to .NET 8 with the text that I mentioned on the other issue. If this is adopted for .NET 8, I'll refactor the text for .NET 8 or later to say that it's the default.

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We're moving this issue to the .NET 8 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
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Thanks for contacting us.

We're moving this issue to the .NET 9 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.