### Godot version

4.1

### System information

Windows

### Issue description

Being able to have multiple cursors similarly to vscode is a great feature, however it's only possible to add carets, not remove them. By left clicking you can remove all extra cursors but you cannot remove a specific one so after selecting multiple lines a single missclick, you have to reselect them all again. Looking at the original pr there was a remove_caret function added so it would make sense to be able to remove carets when clicking again, like in vscode.

![image](https://github.com/godotengine/godot/assets/19669673/3867c00e-9faa-4429-9c6d-f2d6d3883044)


### Steps to reproduce

- Alt click to add multiple carets
- Alt click on the same position again
- Nothing happens

### Minimal reproduction project

N/A
return carets.size();
}
void TextEdit::add_caret_at_carets(bool p_below) {
	Vector<int> caret_edit_order = get_caret_index_edit_order();
	for (const int &caret_index : caret_edit_order) {
		const int caret_line = get_caret_line(caret_index);
		const int caret_column = get_caret_column(caret_index);
		
		
		
		int caret_from_column = 0, caret_to_column = 0, caret_last_fit_x = carets[caret_index].last_fit_x;
		if (has_selection(caret_index)) {
			
			if (get_selection_from_line(caret_index) != get_selection_to_line(caret_index)) {
				deselect(caret_index);
			} else {
				caret_from_column = get_selection_from_column(caret_index);
				caret_to_column = get_selection_to_column(caret_index);
				caret_last_fit_x = -1;
				carets.write[caret_index].last_fit_x = _get_column_x_offset_for_line(caret_column, caret_line, caret_column);
			}
		}
		
		int new_caret_line, new_caret_column, new_caret_from_column = 0, new_caret_to_column = 0;
		_get_above_below_caret_line_column(caret_line, get_caret_wrap_index(caret_index), caret_column, p_below, new_caret_line, new_caret_column, caret_last_fit_x);
		
		if (caret_from_column != caret_to_column) {