HRPD: RAMAN Spectrometer IOC- Acquire single reading

As an HRPD instrument scientist, I want to use a RAMAN spectrometer to acquire a reading so that I can use the RAMAN spectrometer on my beamline.

Part of [#3354](https://github.com/ISISComputingGroup/IBEX/issues/3354).

The key processes are:

1. Set the length of the integration time.
2. Take a single "dark" spectra reading.
3. Sets the laser power.
4. Tells the spectrometer to "acquire".

The IOC will need:
- Asyn driver to communicate with the spectrometer using the B&W SDK.
- An emulator, not necessarily a Lewis emulator, to test the IOC against.
- An IOC
- An OPI
- New icon