Add dataset to store list of software that produced a file

[stephprince]

Motivation

Related pynwb changes for the proposed nwb-schema PR for provenance information.

TODO

• [ ] Update to merge into nwb_schema_2.8.0 branch when reviewed

How to test the behavior?

Checklist

• [ ] Did you update CHANGELOG.md with your changes?
• [x] Have you checked our Contributing document?
• [x] Have you ensured the PR clearly describes the problem and the solution?
• [x] Is your contribution compliant with our coding style? This can be checked running flake8 from the source directory.
• [x] Have you checked to ensure that there aren't other open Pull Requests for the same change?
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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.30%. Comparing base (dc98e84) to head (0b3be53).

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HEAD has 4 uploads less than BASE

Flag	BASE (dc98e84)	HEAD (0b3be53)
integration	4	0

Additional details and impacted files

@@                 Coverage Diff                  @@
##           nwb_schema_2.8.0    #1924      +/-   ##
====================================================
- Coverage             91.85%   83.30%   -8.56%     
====================================================
  Files                    27       27              
  Lines                  2689     2689              
  Branches                701      701              
====================================================
- Hits                   2470     2240     -230     
- Misses                  145      352     +207     
- Partials                 74       97      +23     

Flag	Coverage Δ
integration	?
unit	83.30% <ø> (ø)

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[stephprince]

@rly with the support for writing multidimensional string arrays merged into hdmf, this should be ready to be reviewed.

I think all of the failing tests are from the other 2.8.0 schema changes (SpatialSeries.bounds and ragged Units.waveform_mean/sd)