Revert "Fix #9005: Allow singular tests to be documented in properties.yml"

[ChenyuLInx]

We noticed that #10744 would break if people's project has data_test defined in the top level schema file.
Reverting for now and will put back with skipping that failure

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.10%. Comparing base (d8b1bf5) to head (18b2489).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10790      +/-   ##
==========================================
- Coverage   89.14%   89.10%   -0.04%     
==========================================
  Files         183      183              
  Lines       23321    23258      -63     
==========================================
- Hits        20790    20725      -65     
- Misses       2531     2533       +2     

Flag	Coverage Δ
integration	86.32% <100.00%> (-0.11%)	⬇️
unit	62.29% <100.00%> (+0.07%)	⬆️

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Components	Coverage Δ
Unit Tests	62.29% <100.00%> (+0.07%)	⬆️
Integration Tests	86.32% <100.00%> (-0.11%)	⬇️