Expanding options of PhotoCalibratorProtoDUNESP

[vpec0]

Adding configurables that allow setting calibration constants channel-by-channel.

Adding channel mapping from the channel number to the index in the containers of the constants. Useful when channel numbering convention is not simply 0 .. number-of-channels.

This feature makes this calibrator more generic and usable in other ProtoDUNEs. Main reason now is to have something to calibrate the PDVD PDS.

[vpec0]

Example of how the calibrator service would be configured:

services: {
  ...
  IPhotonCalibrator: {
      BadChannels: []
      SPESizes: [ , ] # SPE amplitude for individual channels
      SPEShifts: [,] # offsets, in units of SPE, can be empty/unset
      ChannelNumbers: [] # offline channel numbers corresponding to the values in the preceding configurables
      service_provider: "PhotonCalibratorServiceProtoDUNESP"
  }
  ...
}

[lpaulucc]

There may be a problem with a lack of default values here

[vpec0]

Indeed. I think I will add empty lists as default in the configuration fhicl. I will keep this PR in the draft mode for now. We need somebody to test this. If there's urgent need for this feature for the PD VD production (MC or keepup). I'll give it higher priority.