Add test for duplicate key provider name

[jeltz]

Additionally remove some pointless queries from the test.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.34%. Comparing base (1fdddb9) to head (c97547d).
Report is 38 commits behind head on TDE_REL_17_STABLE.

❌ Your project status has failed because the head coverage (85.34%) is below the target coverage (90.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@                  Coverage Diff                  @@
##           TDE_REL_17_STABLE     #382      +/-   ##
=====================================================
+ Coverage              84.91%   85.34%   +0.43%     
=====================================================
  Files                     22       22              
  Lines                   2611     2607       -4     
  Branches                 397      395       -2     
=====================================================
+ Hits                    2217     2225       +8     
+ Misses                   314      306       -8     
+ Partials                  80       76       -4     

Components	Coverage Δ
access	84.20% <78.26%> (+1.24%)	⬆️
catalog	88.05% <71.64%> (+0.04%)	⬆️
common	91.80% <100.00%> (ø)
encryption	73.45% <84.61%> (-2.03%)	⬇️
keyring	72.00% <ø> (ø)
src	91.40% <ø> (ø)
smgr	97.41% <98.64%> (+0.12%)	⬆️
transam	∅ <ø> (∅)

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