Add _literal_map_to_python_input to base task

[pingsutw]

Tracking issue

NA

Why are the changes needed?

Add _literal_map_to_python_input base tasks. It allows people to override it, and preprocess the input before deserializing the literal map.

What changes were proposed in this pull request?

Add _literal_map_to_python_input method the base tasks

How was this patch tested?

Unit tests

Setup process

Screenshots

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

NA

Docs link

NA

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1b8ad7e) 85.79% compared to head (54c1ba6) 85.80%.
Report is 9 commits behind head on master.

❗ Current head 54c1ba6 differs from pull request most recent head b70b8ed. Consider uploading reports for the commit b70b8ed to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2150   +/-   ##
=======================================
  Coverage   85.79%   85.80%           
=======================================
  Files         313      313           
  Lines       23576    23581    +5     
  Branches     3530     3530           
=======================================
+ Hits        20228    20233    +5     
  Misses       2738     2738           
  Partials      610      610           

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