DataGridView: Excessive CPU+memory usage when closing form

The root cause seems to be that [this enumeration](https://github.com/dotnet/winforms/blob/1e206698946b9ccc026c045f73ac5b792db4af92/src/System.Windows.Forms/System/Windows/Forms/Controls/DataGridView/DataGridView.Methods.cs#L25605) clones every row and cell in the DataGridView.

The result is it takes ~12 minutes and ~8 GB extra memory just to _dispose_ a DataGridView with ~700k rows.

Abbreviated stack trace:
[DataGridViewRowCollection.this[int].get(int index) Line 137](https://github.com/dotnet/winforms/blob/main/src/System.Windows.Forms/System/Windows/Forms/Controls/DataGridView/DataGridViewRowCollection.cs#L137)
[DataGridView.ReleaseUiaProvider(HWND handle) Line 25605](https://github.com/dotnet/winforms/blob/1e206698946b9ccc026c045f73ac5b792db4af92/src/System.Windows.Forms/System/Windows/Forms/Controls/DataGridView/DataGridView.Methods.cs#L25605)
Control.WmDestroy(ref Message m) Line 11463

**Workaround**: setting every DataGridView's DataSource = null in the FormClosing event eliminates the issue. That seems to imply there's another problem with consistency--if ReleaseUiaProvider needs to be called for every single cell during WmDestroy, why wouldn't it be needed when clearing the DataSource?