Fix(abacus): add judgment on the existence of INPUT/running_scf.log/STRU files in abacus/scf

[pxlxingliang]

return a null dict but not raiseError when INPUT/running_scf.log/STRU files are not exist in abacus/scf.

[codecov-commenter]

Codecov Report

Base: 82.49% // Head: 82.44% // Decreases project coverage by -0.05% ⚠️

Coverage data is based on head (557cd73) compared to base (b92d073).
Patch coverage: 62.50% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##            devel     #405      +/-   ##
==========================================
- Coverage   82.49%   82.44%   -0.06%     
==========================================
  Files          67       67              
  Lines        5919     5929      +10     
==========================================
+ Hits         4883     4888       +5     
- Misses       1036     1041       +5     

Impacted Files	Coverage Δ
dpdata/abacus/scf.py	92.43% <62.50%> (-1.87%)	⬇️

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