Fixed QueryResult creation in QueryCacheMiddleware

[michaelstaib]

#6844 broke the existing caching functionality by changing how a QueryResult is being constructed.
This aligns the construction to the new approach.

Fixes #7054

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 32 lines in your changes missing coverage. Please review.

Project coverage is 77.67%. Comparing base (8d63b3e) to head (e8078ed).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ctions/Properties/AbstractionResources.Designer.cs	35.00%	26 Missing ⚠️
...ions/Execution/CleanupExecutionResultExtensions.cs	40.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7441      +/-   ##
==========================================
- Coverage   78.93%   77.67%   -1.26%     
==========================================
  Files        2452     2821     +369     
  Lines      120730   141558   +20828     
==========================================
+ Hits        95304   109962   +14658     
- Misses      25426    31596    +6170     

Flag	Coverage Δ
unittests	77.67% <60.00%> (-1.26%)	⬇️

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