Remove invalid Fluent DataGridColumn styles

[MitchRazga]

Fixes #9755

Description

Removes invalid Fluent DataGridColumn styles

Customer Impact

Would be good to fix this before .NET 9 releases so that existing codebases can have a smoother transition to new Windows 11 themes

Regression

No

Testing

• Used reproduction from #9755 to reference all resource dictionaries like in Fluent.xaml

	<Application.Resources>
		<ResourceDictionary>
			<ResourceDictionary.MergedDictionaries>
				...
				<ResourceDictionary Source="pack://application:,,,/PresentationFramework.Fluent;component/Styles/ComboBox.xaml" />
				<ResourceDictionary Source="pack://application:,,,/PresentationFramework.Fluent;component/Styles/ContextMenu.xaml" />
				<ResourceDictionary Source="pack://application:,,,/TestResources;component/DataGrid.xaml" />
				<ResourceDictionary Source="pack://application:,,,/PresentationFramework.Fluent;component/Styles/DatePicker.xaml" />
				<ResourceDictionary Source="pack://application:,,,/PresentationFramework.Fluent;component/Styles/Expander.xaml" />
				...
			</ResourceDictionary.MergedDictionaries>
		</ResourceDictionary>
	</Application.Resources>

• Created a local copy of DataGrid.xaml which I made the changes to
• Referenced the local DataGrid.xaml in MergedDictionaries instead of the one in PresentationFramework
• Ran the application a few times Now able to iterate through theme resources without any exceptions

Risk

Minimal

Does not look like these styles are referenced anywhere else.

Likely just something that was missed when the resource dictionaries were ported from WPF UI.

Documentation confirms in multiple places that only FrameworkElement or derived types can have styles for example

Microsoft Reviewers: Open in CodeFlow

[MitchRazga]

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[dipeshmsft]

Thanks @MitchRazga for bringing up this issue and for the fix.