database/tests/schema_details: Use async queries

[Turbo87]

One less codepath using the sync database connection pool :)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.21%. Comparing base (3fa4876) to head (e5468f2).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10010      +/-   ##
==========================================
+ Coverage   89.20%   89.21%   +0.01%     
==========================================
  Files         295      295              
  Lines       30766    30772       +6     
==========================================
+ Hits        27444    27454      +10     
+ Misses       3322     3318       -4     

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