[Bug]: Shapes doesn't snap to grid when multiple shapes are dragged
### What happened?

If you have the grid enabled and select multiple shapes and drag them around, they move in size increments according to the grid, but none of the shapes, nor the bounding box ends up aligned to the grid.

I would expect the top left corner of the bounding box to be aligned to the grid.

Likely related to #4868 and #4869. This happens both with the SDK and on tldraw.com.

### How can we reproduce the bug?

1. Enable the grid
2. Create two note shapes
3. Select both the shapes
4. Move the shapes.

You'll most likely see that the shapes and bonding box aren't aligned to the grid during and after the move. Whether the bug occurs depends on how the shapes are placed in relation to each other, but it seems to happen more often than not, even if both of the shapes are aligned to the grid beforehand.

### What browsers are you seeing the problem on?

Chrome

### Where did this happen?

The developer package

### Contact Details

_No response_

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