Skip or xfail some currently failing or stalling tests

[yarikoptic]

since masks away possible other issues and makes it difficult to assess PRs. The issue is filed, @adswa even had a look already, hopefully gets resolved some time soon.

Ref: #7320

edit: added more tests to be "treated" in hopes to get CI green again

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +1.71 🎉

Comparison is base (06d6b55) 88.69% compared to head (c176969) 90.41%.

Additional details and impacted files

@@            Coverage Diff             @@
##            maint    #7331      +/-   ##
==========================================
+ Coverage   88.69%   90.41%   +1.71%     
==========================================
  Files         327      327              
  Lines       44527    44533       +6     
  Branches     5910     5910              
==========================================
+ Hits        39495    40264     +769     
+ Misses       5017     4250     -767     
- Partials       15       19       +4     

Impacted Files	Coverage Δ
datalad/core/distributed/tests/test_clone.py	98.43% <100.00%> (+<0.01%)	⬆️
datalad/distribution/tests/test_siblings.py	100.00% <100.00%> (ø)
datalad/support/tests/test_annexrepo.py	98.04% <100.00%> (ø)
datalad/tests/test_archives.py	91.97% <100.00%> (+0.05%)	⬆️
datalad/tests/utils_pytest.py	89.22% <100.00%> (+0.13%)	⬆️

... and 28 files with indirect coverage changes

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[yarikoptic]

yikes -- travis got this odd _queue.Empty errorring out of many tests in 1 run, as happened once before in #7243 (comment) and on appveyor in #7088 . restarted that travis run.

[yarikoptic]

@bpoldrack blessed it in matrix. So I will proceed with merge to please other PRs CIs

[yarikoptic-gitmate]

PR released in 0.18.3