Handle relative imports in volume better

[CJ-Wright-Citadel]

We missed a symbol in this audit: symbol-management/api-match-audit@86803ad#diff-1862b12bad147ad174efa035edb162707e3da82a6c825a11122bff1819c069cfR58

Which is coming from https://github.com/ARM-DOE/ACT/blob/v0.7.2/act/plotting/TimeSeriesDisplay.py

I think the issue is that the initial assignment of symbols via shadow in the per module parse has a miss on the shadows dict.

On approach would be:

1. we know that all symbols in the volume must either be also in that volume or be exposed as part of the surface area of the module.
2. We can then see which symbols do not have a matching pair and try to re-point them towards existing symbols. In this case we can see that the volume symbol (utils.data_utils...) is close to the exposed symbol plotting.data_utils...