fix(data check): Minimum number of data columns check fixed (#1062)

[spaulins-usgs]

Minimum number of data columns was not being calculated correctly for columns that can either repeat and be zero. Replaced old calculation of minimum data columns with updated calculation based on the code that builds the column headers.

I have updated this since the last PR to solve to problems on the MF side where it was failing for flow + transport simulations. I have also added a flow + transport simulation to the t505_test autotest cases.

[codecov]

Codecov Report

Merging #1067 (40845da) into develop (8a2cffb) will increase coverage by 0.013%.
The diff coverage is 84.745%.

@@              Coverage Diff              @@
##           develop     #1067       +/-   ##
=============================================
+ Coverage   71.761%   71.775%   +0.013%     
=============================================
  Files          225       225               
  Lines        51891     51916       +25     
=============================================
+ Hits         37238     37263       +25     
  Misses       14653     14653               

Impacted Files	Coverage Δ
flopy/mf6/modflow/mfgnc.py	32.142% <ø> (ø)
flopy/mf6/modflow/mfgwf.py	55.555% <ø> (ø)
flopy/mf6/modflow/mfgwfbuy.py	58.064% <ø> (ø)
flopy/mf6/modflow/mfgwfchd.py	56.521% <ø> (ø)
flopy/mf6/modflow/mfgwfcsub.py	53.781% <ø> (ø)
flopy/mf6/modflow/mfgwfdis.py	62.222% <ø> (ø)
flopy/mf6/modflow/mfgwfdisu.py	59.154% <ø> (ø)
flopy/mf6/modflow/mfgwfdisv.py	59.574% <ø> (ø)
flopy/mf6/modflow/mfgwfdrn.py	56.000% <ø> (ø)
flopy/mf6/modflow/mfgwfevt.py	55.769% <ø> (ø)
... and 62 more