args: trust level for model_devi_job should be optional

[njzjz]

The arguments #786 added should be optional.

[njzjz]

@Cloudac7

[codecov-commenter]

Codecov Report

Merging #818 (832f3ae) into devel (deff833) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##            devel     #818   +/-   ##
=======================================
  Coverage   35.13%   35.13%           
=======================================
  Files          96       96           
  Lines       16808    16808           
=======================================
  Hits         5905     5905           
  Misses      10903    10903           

Impacted Files	Coverage Δ
dpgen/generator/arginfo.py	45.37% <ø> (ø)

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[Cloudac7]

With now dargs based argument checking, it raise dargs.dargs.ArgumentKeyError due to lack of model_devi_f_trust_lo when setting local model_devi_f_trust_lo. Should Optional be set to True for model_devi_f_trust_lo in model_devi_lmp_args?