Add type mapping for IPInterface from Marshmallow

[Cristi075]

I want to use an IPInterface field in order to make use of the built-in validations for networks.

This is the least strict version of the network fields that Marshmallow offers. I could also add in IP, IPv4, IPv4Interface, IPv6, and IPv6Interface.

Currently, if a Marshmallow schema contains an IPInterface field it will be correctly parsed but it won't be included in the automatically generated OpenAPI spec.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.03%. Comparing base (eeb3a62) to head (a29a225).
⚠️ Report is 1 commits behind head on master.
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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #127   +/-   ##
=======================================
  Coverage   97.03%   97.03%           
=======================================
  Files           9        9           
  Lines        1416     1416           
=======================================
  Hits         1374     1374           
  Misses         42       42           

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