Consider if/how we should track RawInput

[KathleenDollard]

RawInput was added to PipelineResult because it might make it easier to do errata. No longer sure it is useful, and it will not be available for args arrays.

Consider dropping

[KathleenDollard]

Adding info:

The text entered for each value result is held in the Location. We need the info, but in theory we could rebuild from ValueResult