Fix more places where feature flags are serialized

[betodealmeida]

CATEGORY

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• Bug Fix
• Enhancement (new features, refinement)
• Refactor
• Add tests
• Build / Development Environment
• Documentation

SUMMARY

#8529 fixed the serialization of the feature flags, but I missed a few places. I reviewed the code tree and fixed the serialization in the other places, updating unit tests accordingly.

TEST PLAN

Update unit tests.

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

REVIEWERS

@khtruong

[codecov-io]

Codecov Report

Merging #8567 into master will increase coverage by 0.04%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master   #8567      +/-   ##
=========================================
+ Coverage   66.75%   66.8%   +0.04%     
=========================================
  Files         450     450              
  Lines       22734   22734              
  Branches     2366    2366              
=========================================
+ Hits        15177   15187      +10     
+ Misses       7419    7409      -10     
  Partials      138     138

Impacted Files	Coverage Δ
superset/views/core.py	72.05% <0%> (ø)	⬆️
superset/db_engine_specs/postgres.py	83.33% <0%> (+27.77%)	⬆️

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