adding a removed type that we missed previously - https://learn.microsoft.com/dotnet/api/system.windows.forms.datagrid.hittestinfo?view=netframework-4.8.1 (#42887)

Author: Tanya-Solyanik

includes/core-changes/windowsforms/3.1/remove-controls-3.1.md

@@ -11,6 +11,7 @@ The following types are no longer available:
 - <xref:System.Windows.Forms.ContextMenu>
 - <xref:System.Windows.Forms.DataGrid>
 - <xref:System.Windows.Forms.DataGrid.HitTestType>
+- <xref:System.Windows.Forms.DataGrid.HitTestInfo>
 - <xref:System.Windows.Forms.DataGridBoolColumn>
 - <xref:System.Windows.Forms.DataGridCell>
 - <xref:System.Windows.Forms.DataGridColumnStyle>