Allow overriding parameters to parameters_only_entry_point

[gabbard]

No description provided.

[codecov]

Codecov Report

Merging #119 into master will increase coverage by 1.53%.
The diff coverage is 86.36%.

@@            Coverage Diff             @@
##           master     #119      +/-   ##
==========================================
+ Coverage   80.83%   82.37%   +1.53%     
==========================================
  Files          26       26              
  Lines        2452     2479      +27     
==========================================
+ Hits         1982     2042      +60     
+ Misses        470      437      -33

Impacted Files	Coverage Δ
vistautils/preconditions.py	58.13% <0%> (ø)	⬆️
vistautils/io_utils.py	91.63% <100%> (+0.14%)	⬆️
vistautils/parameters_only_entrypoint.py	88.46% <84.21%> (+48.46%)	⬆️
vistautils/parameters.py	86.94% <87.17%> (+2.32%)	⬆️
vistautils/logging_utils.py	81.48% <0%> (+51.85%)	⬆️

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