Refactor conductivity

[atztogo]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 92.05021% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.23%. Comparing base (ea142f2) to head (70ff05f).
⚠️ Report is 8 commits behind head on develop.

Files with missing lines	Patch %	Lines
phono3py/conductivity/lbte_calculator.py	74.00%	13 Missing ⚠️
phono3py/conductivity/velocity_providers.py	90.00%	2 Missing ⚠️
phono3py/conductivity/build_components.py	50.00%	1 Missing ⚠️
phono3py/conductivity/lbte_init.py	66.66%	1 Missing ⚠️
phono3py/conductivity/scattering_providers.py	93.33%	1 Missing ⚠️
phono3py/cui/phono3py_script.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #526      +/-   ##
===========================================
- Coverage    78.29%   78.23%   -0.07%     
===========================================
  Files          114      114              
  Lines        18477    18453      -24     
===========================================
- Hits         14467    14437      -30     
- Misses        4010     4016       +6     

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