Modification to Fix conversion of Zarr string dataset to HDF5

[rly]

Proposed changes to #1171.

It would be nice if HDF5IO and the ObjectMapper can accept any Zarr array just like it accepts any Numpy array, instead of accepting only Zarr arrays that have been written with hdmf-zarr.

[codecov[bot]]

Codecov Report

:x: Patch coverage is 32.00000% with 17 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 88.67%. Comparing base (2b90d21) to head (deec517). :warning: Report is 1 commits behind head on fix/zarr_str_export.

Files with missing lines	Patch %	Lines
src/hdmf/build/objectmapper.py	18.75%	11 Missing and 2 partials :warning:
src/hdmf/utils.py	57.14%	2 Missing and 1 partial :warning:
src/hdmf/backends/hdf5/h5tools.py	50.00%	0 Missing and 1 partial :warning:

Additional details and impacted files

@@                   Coverage Diff                   @@
##           fix/zarr_str_export    #1175      +/-   ##
=======================================================
- Coverage                88.83%   88.67%   -0.16%     
=======================================================
  Files                       45       45              
  Lines                     9841     9855      +14     
  Branches                  2798     2802       +4     
=======================================================
- Hits                      8742     8739       -3     
- Misses                     779      794      +15     
- Partials                   320      322       +2     

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[rly]

Tests are failing because the base PR is too out of date. I will merge and we can review in the base PR.