Added data file download for pull from other registry

[kzscisoft]

Adds download of actual data files when running fair pull.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #198 (f814cd6) into develop (647e602) will increase coverage by 0.11%.
The diff coverage is 80.85%.

@@             Coverage Diff             @@
##           develop     #198      +/-   ##
===========================================
+ Coverage    74.20%   74.31%   +0.11%     
===========================================
  Files           24       25       +1     
  Lines         3512     3570      +58     
===========================================
+ Hits          2606     2653      +47     
- Misses         906      917      +11     

Impacted Files	Coverage Δ
fair/session.py	63.24% <50.00%> (-0.19%)	⬇️
fair/registry/requests.py	81.92% <66.66%> (-1.41%)	⬇️
fair/registry/storage.py	74.53% <80.48%> (+1.98%)	⬆️
fair/registry/sync.py	86.80% <82.35%> (-4.02%)	⬇️
fair/register.py	79.16% <100.00%> (+0.94%)	⬆️
fair/registry/__init__.py	100.00% <100.00%> (ø)
fair/user_config/__init__.py	76.29% <100.00%> (+0.06%)	⬆️
fair/user_config/globbing.py	43.93% <100.00%> (ø)
fair/user_config/validation.py	94.00% <100.00%> (+0.06%)	⬆️

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