refactor: fix long lines to resolve check E501

[mwtoews]

This refactor resolves long line checks. See ruff check code E501 for more.

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 2 lines in your changes missing coverage. Please review.

Project coverage is 76.2%. Comparing base (dc394cd) to head (0e3add9).
Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
flopy/export/metadata.py	0.0%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #2368     +/-   ##
=========================================
+ Coverage     74.5%   76.2%   +1.6%     
=========================================
  Files          292     292             
  Lines        59624   59625      +1     
=========================================
+ Hits         44463   45461    +998     
+ Misses       15161   14164    -997     

Files with missing lines	Coverage Δ
flopy/discretization/grid.py	75.7% <ø> (+0.6%)	⬆️
flopy/discretization/unstructuredgrid.py	81.0% <ø> (+0.1%)	⬆️
flopy/export/netcdf.py	49.2% <ø> (ø)
flopy/export/shapefile_utils.py	84.0% <ø> (ø)
flopy/export/utils.py	64.6% <ø> (ø)
flopy/export/vtk.py	78.0% <ø> (ø)
flopy/mbase.py	72.1% <ø> (ø)
flopy/mfusg/mfusgbcf.py	80.4% <ø> (ø)
flopy/mfusg/mfusglpf.py	80.4% <ø> (ø)
flopy/modflow/mf.py	69.2% <ø> (ø)
... and 31 more

... and 75 files with indirect coverage changes