Sift tool must be updated to work for arbitrary models / libraries

[jonn-smith]

Currently sift only works for mas_15_sc_10x5p_single_none.

We must expand this tool to work for any input library by removing the "validation model" (10x_sc_10x5p_single_none) and deriving a custom validation model at runtime for the input model.

In addition, we must address the following:

• sift should be updated to include information about MAS adapters, rather than relying on random segments at the start of each array element
• model::validate_model must be updated to remove the "skip" for the validation model. Validation models should be valid models, or the logic must be updated to somehow validate them.