Deprecate local fixtures for libvcs pytest plugin

[tony]

No description provided.

[codecov]

Codecov Report

Merging #398 (b8f1c9e) into master (b9c0aa1) will decrease coverage by 1.54%.
The diff coverage is 82.35%.

❗ Current head b8f1c9e differs from pull request most recent head f33e1ae. Consider uploading reports for the commit f33e1ae to get more accurate results

@@            Coverage Diff             @@
##           master     #398      +/-   ##
==========================================
- Coverage   86.33%   84.79%   -1.55%     
==========================================
  Files          15       15              
  Lines         893      855      -38     
  Branches      132      133       +1     
==========================================
- Hits          771      725      -46     
- Misses         87       94       +7     
- Partials       35       36       +1     

Impacted Files	Coverage Δ
tests/conftest.py	78.04% <76.92%> (-20.69%)	⬇️
tests/test_sync.py	91.54% <100.00%> (ø)

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