test: use DirectPath for YCSB tests

[olavloite]

No description provided.

[codecov]

Codecov Report

Merging #997 (2eec89d) into postgresql-dialect (3751ba5) will increase coverage by 0.02%.
Report is 1 commits behind head on postgresql-dialect.
The diff coverage is n/a.

@@                   Coverage Diff                    @@
##             postgresql-dialect     #997      +/-   ##
========================================================
+ Coverage                 90.29%   90.31%   +0.02%     
  Complexity                 2556     2556              
========================================================
  Files                       141      141              
  Lines                      8508     8508              
  Branches                   1264     1264              
========================================================
+ Hits                       7682     7684       +2     
+ Misses                      562      560       -2     
  Partials                    264      264              

Flag	Coverage Δ
all_tests	90.31% <ø> (+0.02%)	⬆️

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see 1 file with indirect coverage changes

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