Draft: Save Spruce reports to a raw bank

Nicole Skidmorerequested to merge
sprucereports into master

The Sprucing will output a ROOT file with rawbanks in. The sprucing reports must therefore be saved as a rawbank. This MR allows the writing and decoding of a HltDecReport for the sprucing using the sourceID 3.

See

Edited by Nicole Skidmore

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