Instrument Scripts: do_sans and do_trans without sample changer or data collection

As a scientist on LOQ (and potentially on SANS2D) I would like a do_sans/do_trans command that configures the instrument without moving the sample changer or taking data. e.g. on LOQ it would do the following:

```
do_trans() would: move Aperture2 to position ‘small’, move Monitor3 to position ‘in’, load wiring8, detector8 & spectra8

do_sans() would: move Monitor3 to position ‘out’, move Aperture2 to position ‘medium’, load wiring35576_M4, detector35576_M4 & spectra35576_M4

Motions executed in the order shown. And on LOQ they assumed histogram collection.
```

## Acceptance Criteria
* There are do_sans/do_trans commands that do no samplechanger movement or data collection