Move setup step to init in Abiotic and AbioticSimple models

[dalonsoa]

Description

It was done already for the Hydrology model but I forgot to do the same for the other two. The main changes have more to do with fixing the tests than the actual change in the code.

Fixes # N/A

Type of change

• New feature (non-breaking change which adds functionality)
• Optimization (back-end change that speeds up the code)
• Bug fix (non-breaking change which fixes an issue)

Key checklist

• Make sure you've run the pre-commit checks: $ pre-commit run -a
• All tests pass: $ poetry run pytest

Further checks

• Code is commented, particularly in hard-to-understand areas
• Tests added that prove fix is effective or that feature works
• Relevant documentation reviewed and updated

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.98%. Comparing base (7ce59b2) to head (997f395).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #524   +/-   ##
========================================
  Coverage    94.97%   94.98%           
========================================
  Files           74       74           
  Lines         4141     4145    +4     
========================================
+ Hits          3933     3937    +4     
  Misses         208      208           

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[davidorme]

@TaranRallings - The animal model also uses a setup method, which is currently also called from within __init__, so runs twice.

[vgro]

LGTM