MVC Tutorial: Add a new section reviewing concurrency exception handling

Add a new section that shows how concurrency exception handling is used, called:
Review concurrency exception handling

Place just after the routing section but before the Posting and binding section.

Follow as much as we can how we have this covered for the Razor series here.
[Review concurrency exception handling](https://learn.microsoft.com/en-us/aspnet/core/tutorials/razor-pages/da1?view=aspnetcore-7.0#review-concurrency-exception-handling)

Related to PR #27798

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#### Document Details

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* ID: 582aeaf8-770f-6861-ab47-bb6a4f2206e4
* Version Independent ID: 51894773-82dc-3c71-f675-8af42cfa925f
* Content: [Part 6, controller methods and views in ASP.NET Core](https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-mvc-app/controller-methods-views?view=aspnetcore-7.0)
* Content Source: [aspnetcore/tutorials/first-mvc-app/controller-methods-views.md](https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/tutorials/first-mvc-app/controller-methods-views.md)
* Product: **aspnet-core**
* Technology: **aspnetcore-tutorials**
* GitHub Login: @wadepickett
* Microsoft Alias: **wpickett**

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[Associated WorkItem - 46158](https://dev.azure.com/msft-skilling/Content/_workitems/edit/46158)