Enable zarr backend testing in data tests [3]

[h-mayorquin]

Final follow-up on #1083.

This checks that passing a backend_configurator object works with both zarr and hdf5.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.58%. Comparing base (36464df) to head (38e0104).
Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1094      +/-   ##
==========================================
+ Coverage   90.44%   90.58%   +0.13%     
==========================================
  Files         129      129              
  Lines        8055     8164     +109     
==========================================
+ Hits         7285     7395     +110     
+ Misses        770      769       -1     

Flag	Coverage Δ
unittests	90.58% <100.00%> (+0.13%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...c/neuroconv/tools/testing/data_interface_mixins.py	95.62% <100.00%> (+0.15%)	⬆️

... and 1 file with indirect coverage changes