fix: handle python_date_format in ExploreMixin

[betodealmeida]

SUMMARY

The ExploreMixin class is missing the logic to handle python_date_format, adding it.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

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 #24062 (a27d13a) into master (de96372) will increase coverage by 1.76%.
The diff coverage is 45.45%.

❗ Current head a27d13a differs from pull request most recent head 58c0d5a. Consider uploading reports for the commit 58c0d5a to get more accurate results

@@            Coverage Diff             @@
##           master   #24062      +/-   ##
==========================================
+ Coverage   66.46%   68.22%   +1.76%     
==========================================
  Files        1942     1942              
  Lines       75205    75215      +10     
  Branches     8145     8145              
==========================================
+ Hits        49986    51318    +1332     
+ Misses      23134    21812    -1322     
  Partials     2085     2085              

Flag	Coverage Δ
hive	53.16% <9.09%> (?)
mysql	78.91% <9.09%> (-0.03%)	⬇️
postgres	78.99% <9.09%> (-0.03%)	⬇️
presto	53.09% <45.45%> (?)
python	82.77% <45.45%> (+3.62%)	⬆️
sqlite	77.51% <9.09%> (-0.03%)	⬇️
unit	53.03% <9.09%> (?)

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

Impacted Files	Coverage Δ
superset/models/helpers.py	69.11% <45.45%> (-0.10%)	⬇️

... and 91 files with indirect coverage changes

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[sadpandajoe]

🏷️ preset:2023.19