dtype warnings for VALUE columns

[maartenbrinkerink]

Conda environment check

• [x] I have tried using the osemosys-global conda environment.

Current Behavior

Warning pops up every time a dtype is trying to be set on the VALUE columns for output csv's.

Expected Behavior

For either the correct dtype to be set or to add the VALUE column as an exception. Since the VALUE column might be differnt dtypes depending on the specific output csv it is not added right now to the relevant constant.csv.

Steps To Reproduce

No response

Operating System

No response

Log output

No response

Anything else?

No response

[trevorb1]

We should be able to extract out the datatypes from the otoole config file, and just get rid of the DTYPES constant