Support correct path when instantiate via chaining

[timkpaine]

needs fsspec/filesystem_spec#1929

[github-actions]

Test Results

4 tests   3 ✅  0s ⏱️
1 suites  1 💤
1 files    0 ❌

Results for commit 723fc37.

[codecov]

Codecov Report

❌ Patch coverage is 48.00000% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.66%. Comparing base (033062b) to head (723fc37).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
fsspec_python/tests/conftest.py	46.15%	14 Missing ⚠️
fsspec_python/importer.py	30.00%	5 Missing and 2 partials ⚠️
fsspec_python/fs.py	64.28%	3 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main       #7       +/-   ##
===========================================
- Coverage   78.26%   66.66%   -11.60%     
===========================================
  Files          11       10        -1     
  Lines         184      207       +23     
  Branches       21       25        +4     
===========================================
- Hits          144      138        -6     
- Misses         24       53       +29     
  Partials       16       16               

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