Free GitRepo.bare of its ConfigManager-dependency

[mih]

Fixes #6322

[codecov]

Codecov Report

Merging #6323 (3f20f93) into master (2b92a76) will decrease coverage by 30.54%.
The diff coverage is 100.00%.

❗ Current head 3f20f93 differs from pull request most recent head 1122d2e. Consider uploading reports for the commit 1122d2e to get more accurate results

@@             Coverage Diff             @@
##           master    #6323       +/-   ##
===========================================
- Coverage   89.87%   59.33%   -30.55%     
===========================================
  Files         331      331               
  Lines       43210    43186       -24     
===========================================
- Hits        38835    25623    -13212     
- Misses       4375    17563    +13188     

Impacted Files	Coverage Δ
datalad/support/gitrepo.py	82.48% <100.00%> (-8.42%)	⬇️
datalad/version.py	0.00% <0.00%> (-100.00%)	⬇️
datalad/plugin/wtf.py	0.00% <0.00%> (-100.00%)	⬇️
datalad/plugin/addurls.py	0.00% <0.00%> (-100.00%)	⬇️
datalad/interface/clean.py	0.00% <0.00%> (-100.00%)	⬇️
datalad/interface/rerun.py	0.00% <0.00%> (-100.00%)	⬇️
datalad/plugin/__init__.py	0.00% <0.00%> (-100.00%)	⬇️
datalad/plugin/no_annex.py	0.00% <0.00%> (-100.00%)	⬇️
datalad/interface/unlock.py	0.00% <0.00%> (-100.00%)	⬇️
datalad/distribution/drop.py	0.00% <0.00%> (-100.00%)	⬇️
... and 208 more

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[mih]

Will proceed.