feat(DB engine spec): get_catalog_names

[betodealmeida]

SUMMARY

Add a method get_catalog_names to the base DB engine spec, and implement it in Postgres as a reference.

This supports #22862. Right now it's not used anywhere, but it's needed in order to implement a hook for generating catalog-level permissions.

Next step is implementing get_catalog_names in more DB engine specs:

• BigQuery
• Drill
• Snowflake
• Trino
• ?

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 #23447 (64d9622) into master (226b60b) will increase coverage by 0.00%.
The diff coverage is 88.88%.

@@           Coverage Diff           @@
##           master   #23447   +/-   ##
=======================================
  Coverage   67.63%   67.63%           
=======================================
  Files        1908     1908           
  Lines       73729    73738    +9     
  Branches     7989     7989           
=======================================
+ Hits        49867    49875    +8     
- Misses      21814    21815    +1     
  Partials     2048     2048           

Flag	Coverage Δ
hive	52.73% <77.77%> (+<0.01%)	⬆️
javascript	53.82% <ø> (ø)
mysql	78.44% <77.77%> (-0.01%)	⬇️
postgres	78.50% <88.88%> (+<0.01%)	⬆️
presto	52.66% <77.77%> (+<0.01%)	⬆️
python	82.36% <88.88%> (+<0.01%)	⬆️
sqlite	77.01% <77.77%> (+<0.01%)	⬆️
unit	52.59% <77.77%> (+<0.01%)	⬆️

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Impacted Files	Coverage Δ
superset/db_engine_specs/base.py	90.86% <80.00%> (-0.09%)	⬇️
superset/db_engine_specs/postgres.py	97.10% <100.00%> (+0.08%)	⬆️

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[villebro]

This is exciting stuff! 🤩