fix: writing abacus stru.

[starinthesky72]

When using system.to() and convert data to write ABACUS STRU file, func make_unlabeled_stru won't use atom_types in data and miswriting the atom order.
For example when using data from gaussian/log and other file using ungrouped atom coordinations,as the atom_types=[0,1,1,1,2,1] the func will write wrong coordinations and regard the atom as atom_types=[0,1,1,1,1,2] which cause serious problem.

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (1b9daf4) 82.69% compared to head (3ddf5ed) 82.70%.

Additional details and impacted files

@@           Coverage Diff           @@
##            devel     #478   +/-   ##
=======================================
  Coverage   82.69%   82.70%           
=======================================
  Files          70       70           
  Lines        6393     6394    +1     
=======================================
+ Hits         5287     5288    +1     
  Misses       1106     1106           

Impacted Files	Coverage Δ
dpdata/abacus/scf.py	93.27% <100.00%> (+0.02%)	⬆️

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