adding support for remote to local operations in shutil.py::copytree

[brno32]

Step 1 to address #221

Splitting this into two PRs.

I had trouble getting the tests to work locally (even the unit tests that don't need an actual samba share to talk to), but tested manually. I am expecting the test I added to pass in CI

[codecov]

Codecov Report

Merging #226 (66f5609) into master (8008656) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #226      +/-   ##
==========================================
+ Coverage   99.07%   99.09%   +0.01%     
==========================================
  Files          24       24              
  Lines        5082     5083       +1     
==========================================
+ Hits         5035     5037       +2     
+ Misses         47       46       -1     

Flag	Coverage Δ
	99.09% <100.00%> (+0.01%)	⬆️
py3.10	99.05% <100.00%> (+0.01%)	⬆️
py3.11	99.05% <100.00%> (+0.09%)	⬆️
py3.7	99.05% <100.00%> (+0.01%)	⬆️
py3.8	99.05% <100.00%> (+0.01%)	⬆️
py3.9	99.09% <100.00%> (+0.10%)	⬆️
x64	99.09% <100.00%> (+0.01%)	⬆️
x86	99.01% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/smbclient/shutil.py	95.71% <100.00%> (+0.52%)	⬆️

... and 5 files with indirect coverage changes

[jborean93]

Thanks for working on this.