Changed name of descriptors. strict arg check of hybrid

[amcadmus]

• se_a -> se_e2_a
• se_r -> se_e2_r
• se_t -> se_e3

check the items in the descriptor list of descriptor hybrid.

[codecov-commenter]

Codecov Report

Merging #532 (de64273) into devel (5600b44) will decrease coverage by 0.17%.
The diff coverage is 14.28%.

@@            Coverage Diff             @@
##            devel     #532      +/-   ##
==========================================
- Coverage   62.32%   62.15%   -0.18%     
==========================================
  Files          74       74              
  Lines        6182     6220      +38     
==========================================
+ Hits         3853     3866      +13     
- Misses       2329     2354      +25     

Impacted Files	Coverage Δ
deepmd/utils/argcheck.py	16.66% <10.00%> (-0.27%)	⬇️
deepmd/train/trainer.py	38.32% <25.00%> (ø)
deepmd/utils/compat.py	77.77% <0.00%> (-10.89%)	⬇️
deepmd/entrypoints/train.py	23.52% <0.00%> (+0.22%)	⬆️

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