Replace legacy services.Configure code

See embedded code [here](https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/fundamentals/localization/select-language-culture.md?plain=1#L99)

Write that for .NET 6+ or better yet put that code in https://github.com/dotnet/AspNetCore.Docs/tree/main/aspnetcore/fundamentals/localization/sample/6.x so we can import the snippet

@hishamcocan you take this?

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#### Document Details

⚠ *Do not edit this section. It is required for learn.microsoft.com ➟ GitHub issue linking.*

* ID: b4841fb3-f720-fdc5-851c-80d336abfbe1
* Version Independent ID: b4841fb3-f720-fdc5-851c-80d336abfbe1
* Content: [Strategies for selecting language and culture in a localized ASP.NET Core app](https://learn.microsoft.com/en-us/aspnet/core/fundamentals/localization/select-language-culture?view=aspnetcore-8.0)
* Content Source: [aspnetcore/fundamentals/localization/select-language-culture.md](https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/fundamentals/localization/select-language-culture.md)
* Product: **aspnet-core**
* Technology: **aspnetcore-fundamentals**
* GitHub Login: @Rick-Anderson
* Microsoft Alias: **riande**

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[Associated WorkItem - 89656](https://dev.azure.com/msft-skilling/Content/_workitems/edit/89656)