Tank PMT Waveform Simulation

[atcsutton]

Describe your changes

Implementation of waveform simulation for tank PMTs. PMTWaveformSim generates PMT waveforms based on the simulated PMT hits. For each MCHit a lognorm waveform is sampled based on fit parameters extracted from SPE waveforms in data. The fit parameters are randomly sampled in a way that conserved the covariance between parameters and captures the random behavior of a PMT's response. A full extended readout window (70 us) is sampled and waveforms from overlapping hits are added. A random baseline between 300 and 350 ADC is added. Random noise is applied, where the noise sigma is sampled from a Gaussian with mean 1 and std dev of 0.25. The baseline and noise envelope values are hard-coded at the moment. Finally, any ADC counts above 4095 are clipped to mimic saturation.

In addition to the PMT waveform simulation, I did find a bug in PhaseIIADCCalibrator. The bug means that the baseline variance is incorrectly calculated. I should split that out into a separate PR, but I'm also making changes to PhaseIIADCHitFinder to incorporate MC waveforms, so it kinda makes sense to include the bugfix here (if you squint your brain).

8 of the 17 modified files are for the example config.
2 are the Unity and Factory updates.
3 are the tool itself (cpp, h, and readme).
1 is an update to the Waveform.h DataModel which creates a new MCWaveform class that inherits from base Waveforms.
2 are changes needed in PhaseIIADCHitFinder to incorporate MCWaveforms.
And the final change is addressing the PhaseIIADCCalibrator bug mentioned above.

Checklist before submitting your PR

• [✔︎] This PR implements a single change (one new/modified Tool, or a set of changes to implement one new/modified feature)
• [✔︎] This PR alters the minimum number of files to affect this change
• [✔︎] If this PR includes a new Tool, a README and minimal demonstration ToolChain is provided
• [✔︎] If a new Tool/ToolChain requires model or configuration files, their paths are not hard-coded, and means of generating those files is described in the readme, with examples provided on /pnfs/annie/persistent
• [✔︎] For every new usage, there is a reason the data must be on the heap
• [✔︎] For every new there is a delete, unless I explicitly know why (e.g. ROOT or a BoostStore takes ownership)

Additional Material

See https://annie-docdb.fnal.gov/cgi-bin/sso/ShowDocument?docid=5821 for some details

[atcsutton]

I'm working on some mods that will incorporate BackTracker in a nice way. Seems like this will entail removing the MCWaveform class and instead expanding the ADCPulse class to have the pulse stop time.