This PR adds an optional `clone: bool` argument to
`workspace::MoveItemToPane` and `workspace::MoveItemToPaneInDirection`
which causes the item to be cloned into the destination pane rather than
moved. It provides similar functionality to
`workbench.action.splitEditorToRightGroup` in vscode.
This PR supercedes #25030.
Closes#24889
Release Notes:
- Add optional `clone: bool` (default: `false`) to
`workspace::MoveItemToPane` and `workspace::MoveItemToPaneInDirection`
which causes the item to be cloned into the destination pane rather than
moved.