fix: Changes the return type of get_permissions to be JSON friendly

[michael-s-molina]

SUMMARY

Changes the return type of superset/views/utils/get_permissions to be JSON friendly. At Preset, we noticed a bunch of serialization errors because the permissions were returned as Set instead of List.

Big thanks to @zephyring for investigating the issue.

TESTING INSTRUCTIONS

Before merging, we'll deploy this fix to our test environments to make sure it fixes the issue.

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #20472 (2dbed8e) into master (cf4f05e) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #20472      +/-   ##
==========================================
+ Coverage   66.72%   66.75%   +0.02%     
==========================================
  Files        1739     1739              
  Lines       65130    65143      +13     
  Branches     6898     6898              
==========================================
+ Hits        43459    43483      +24     
+ Misses      19921    19910      -11     
  Partials     1750     1750              

Flag	Coverage Δ
hive	53.71% <100.00%> (-0.02%)	⬇️
mysql	82.33% <100.00%> (?)
postgres	82.40% <100.00%> (+<0.01%)	⬆️
presto	53.57% <100.00%> (-0.02%)	⬇️
python	82.84% <100.00%> (+0.04%)	⬆️
sqlite	82.19% <100.00%> (+<0.01%)	⬆️
unit	50.55% <20.00%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
superset/views/utils.py	80.98% <100.00%> (+0.21%)	⬆️
superset/views/core.py	77.36% <0.00%> (+0.47%)	⬆️
superset/models/core.py	89.15% <0.00%> (+0.72%)	⬆️
superset/db_engine_specs/mysql.py	97.59% <0.00%> (+3.61%)	⬆️
superset/common/utils/dataframe_utils.py	92.85% <0.00%> (+7.14%)	⬆️

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[rusackas]

Hooray, CI passed!! I'll test it on Preset's environment.

[rusackas]

It works! Code LGTM too :)

[sadpandajoe]

🏷️ preset:2022.25