fix(database-api): allow search for all columns

[villebro]

SUMMARY

#19051 broke filtering databases by other than allow_file_upload and expose_in_sqllab, causing trouble in both SQL Lab and the database list view. This removes the list of explicit search_columns so that filtering by all properties is again possible.

AFTER

SQL Lab:

Database list view sorting by AQE:

BEFORE

SQL Lab:

Database list view:

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue: closes Filter column: database_name not allowed to filter #19655
• 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 #19662 (47bce81) into master (5c63df5) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #19662      +/-   ##
==========================================
- Coverage   66.47%   66.47%   -0.01%     
==========================================
  Files        1681     1681              
  Lines       64468    64467       -1     
  Branches     6607     6607              
==========================================
- Hits        42857    42856       -1     
  Misses      19917    19917              
  Partials     1694     1694              

Flag	Coverage Δ
hive	52.66% <ø> (-0.01%)	⬇️
mysql	81.90% <ø> (-0.01%)	⬇️
postgres	81.95% <ø> (-0.01%)	⬇️
presto	52.51% <ø> (-0.01%)	⬇️
python	82.39% <ø> (-0.01%)	⬇️
sqlite	81.72% <ø> (-0.01%)	⬇️
unit	47.71% <ø> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
superset/databases/api.py	94.01% <ø> (-0.03%)	⬇️

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[zhaoyongjie]

Tested in my local. LGTM. the search column in FAB seems that it can't search boolean fields.