fix get_data_shape for unbounded dataset

[bendichter]

• create a custom get_data_shape that does not return maxshape
• write test that has an unbounded dataset

[codecov-commenter]

Codecov Report

Merging #315 (4f65e35) into dev (d324736) will decrease coverage by 0.00%.
The diff coverage is 95.00%.

❗ Current head 4f65e35 differs from pull request most recent head 3c81420. Consider uploading reports for the commit 3c81420 to get more accurate results

@@            Coverage Diff             @@
##              dev     #315      +/-   ##
==========================================
- Coverage   93.91%   93.90%   -0.01%     
==========================================
  Files          20       20              
  Lines        1068     1083      +15     
==========================================
+ Hits         1003     1017      +14     
- Misses         65       66       +1     

Flag	Coverage Δ
unittests	93.90% <95.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
src/nwbinspector/checks/tables.py	96.66% <ø> (-0.04%)	⬇️
src/nwbinspector/utils.py	87.27% <94.11%> (+1.25%)	⬆️
src/nwbinspector/checks/ecephys.py	100.00% <100.00%> (ø)
src/nwbinspector/checks/ophys.py	100.00% <100.00%> (ø)
src/nwbinspector/checks/time_series.py	95.12% <100.00%> (-0.12%)	⬇️

[CodyCBakerPhD]

Re-triggering tests after pre-commit bot, something strange happened