Speed up TaskValidation

[munrojm]

Add the option to pass pre-fabricated potcar hash dictionary to TaskValidation in order to speed up distributed running.

[codecov-commenter]

Codecov Report

Merging #458 (9ecbee6) into main (595cbe6) will decrease coverage by 0.00%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##             main     #458      +/-   ##
==========================================
- Coverage   97.67%   97.66%   -0.01%     
==========================================
  Files         115      115              
  Lines       23857    23860       +3     
==========================================
+ Hits        23302    23304       +2     
- Misses        555      556       +1     

Impacted Files	Coverage Δ
...met-builders/emmet/builders/vasp/task_validator.py	67.56% <25.00%> (-0.08%)	⬇️

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