ENH: include version of datalad in tests teardown Versions: report

[yarikoptic]

In particular useful while troubleshooting extensions, which would
typically reuse the same setup/teardown as of the core package.

Ran into such a desire while looking at mih/datalad-mihextras#27

[codecov]

Codecov Report

Merging #6628 (d1e53ea) into maint (a69fc7d) will increase coverage by 0.19%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##            maint    #6628      +/-   ##
==========================================
+ Coverage   90.97%   91.17%   +0.19%     
==========================================
  Files         353      353              
  Lines       44483    44485       +2     
==========================================
+ Hits        40469    40557      +88     
+ Misses       4014     3928      -86     

Impacted Files	Coverage Δ
datalad/__init__.py	85.71% <100.00%> (+0.08%)	⬆️
datalad/customremotes/tests/test_archives.py	89.28% <0.00%> (-0.65%)	⬇️
datalad/utils.py	85.48% <0.00%> (+0.08%)	⬆️
datalad/support/tests/test_annexrepo.py	97.87% <0.00%> (+0.27%)	⬆️
datalad/distribution/create_sibling.py	65.42% <0.00%> (+0.28%)	⬆️
datalad/local/add_archive_content.py	88.13% <0.00%> (+0.42%)	⬆️
datalad/distributed/tests/test_ria_basics.py	98.15% <0.00%> (+0.52%)	⬆️
datalad/support/tests/test_sshconnector.py	98.76% <0.00%> (+0.61%)	⬆️
datalad/local/rerun.py	96.41% <0.00%> (+0.65%)	⬆️
datalad/runner/tests/test_witless_runner.py	95.39% <0.00%> (+0.65%)	⬆️
... and 16 more

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[yarikoptic]

well, it is minor, easy to revert, and no objections were voiced. Let's proceed.