Fix config issues relating to 'columns' default values and retrieving rfc da parameters

Quick updates to config module/retrieval. Set default values for columns if user leaves this parameter blank. This includes a @validator to set defaults based on whether it is a NHDNetwork or HYFeaturesNetwork.

Also fixed retrieving rfc_da parameters in read_geopkg() function. This was looking for these parameters in waterbody_parameters which was the old method. Now looks in data_assimilation_parameters where they actually are for V4.

Additions

network_topology_parameters.py

Default values for columns for both NHD and HYFeatures networks
@validator to set appropriate default values based on network_type

Removals

Changes

HYFeaturesNetwork.py

Updated where rfc_da parameters are retrieved from

Testing

Screenshots

Notes

Todos

Checklist

[ ] PR has an informative and human-readable title
[ ] Changes are limited to a single goal (no scope creep)
[ ] Code can be automatically merged (no conflicts)
[ ] Code follows project standards (link if applicable)
[ ] Passes all existing automated tests
[ ] Any change in functionality is tested
[ ] New functions are documented (with a description, list of inputs, and expected output)
[ ] Placeholder code is flagged / future todos are captured in comments
[ ] Visually tested in supported browsers and devices (see checklist below :point_down:)
[ ] Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)
[ ] Reviewers requested with the Reviewers tool :arrow_right:

Testing checklist

Target Environment support

[ ] Windows
[ ] Linux
[ ] Browser

Accessibility

[ ] Keyboard friendly
[ ] Screen reader friendly

Other

[ ] Is useable without CSS
[ ] Is useable without JS
[ ] Flexible from small to large screens
[ ] No linting errors or warnings
[ ] JavaScript tests are passing

NOAA-OWP / t-route