App crash: XAML parser (unlike BAML loader) prematurely evaluates markup extensions
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Description
1. Open and build attached project in VS.
2. Run application.
3. Click on PaserXAML button.
Expected: app does not crash
Actual: app crashes
Note: app repros VS XAML designer. This is related to [customer feedback](https://developercommunity.visualstudio.com/t/XamlSetMarkupExtension-not-called-in-Dei/10217377).
[WpfCoreMarkupIssue.zip](https://github.com/dotnet/wpf/files/10156522/WpfCoreMarkupIssue.zip)
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