RF: rev_resolve_path() -> resolve_path()

[mih]

Fixes gh-3778

Old function is now an internal helper of annotate_paths(), and the tests have moved their as well. A more extensive test suite for the "new" function was already in place.

[codecov]

Codecov Report

Merging #3797 into master will decrease coverage by 0.29%.
The diff coverage is 96.42%.

@@            Coverage Diff            @@
##           master    #3797     +/-   ##
=========================================
- Coverage   80.68%   80.39%   -0.3%     
=========================================
  Files         273      273             
  Lines       35917    36072    +155     
=========================================
+ Hits        28981    28999     +18     
- Misses       6936     7073    +137

Impacted Files	Coverage Δ
datalad/distributed/create_sibling_gitlab.py	18.83% <0%> (ø)	⬆️
datalad/distribution/clone.py	90.85% <100%> (ø)	⬆️
datalad/local/subdatasets.py	81.19% <100%> (ø)	⬆️
datalad/interface/tests/test_annotate_paths.py	100% <100%> (ø)	⬆️
datalad/core/local/diff.py	96.15% <100%> (ø)	⬆️
datalad/core/local/status.py	96.03% <100%> (ø)	⬆️
datalad/core/local/create.py	96.21% <100%> (ø)	⬆️
datalad/interface/unlock.py	98.57% <100%> (ø)	⬆️
datalad/distribution/dataset.py	93.11% <100%> (-0.18%)	⬇️
datalad/interface/base.py	90.06% <100%> (ø)	⬆️
... and 12 more

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