[Blazor] InputFile support for `cancel` event

[hakenr]

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

Currently, InputFile does not handle the cancel event in this scenario (#49148):

1. Click on the file input.
2. Select a file. OnChange will be invoked.
3. Click on the file input again.
4. Click "Cancel" in the file selection window. The file input will be cleared, but OnChange will not be invoked, so the app still thinks a file is selected.

There hasn't been a way to handle this, as there was no signal from the browser about the dialog being canceled. However, there is now a cancel event that can be used.

Describe the solution you'd like

I would like to subscribe to the cancel event of the underlying <input type="file"> and invoke OnChange.Invoke(new()) with an empty list of files.

Additional context

Related issue: havit/Havit.Blazor#884
Related discussion: https://stackoverflow.com/a/76926836/4150304