Add test for config per policy source

[lcarva]

Relates #1113

[lcarva]

This test demonstrates that the config per source does show up on the report. It means that something else is amiss in #1113. It is a good test to have nonetheless.

[codecov]

Codecov Report

Merging #1153 (42bb5cc) into main (5fc4117) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1153   +/-   ##
=======================================
  Coverage   84.87%   84.87%           
=======================================
  Files          65       65           
  Lines        5124     5124           
=======================================
  Hits         4349     4349           
  Misses        775      775           

Flag	Coverage Δ
acceptance	70.30% <ø> (+0.05%)	⬆️
generative	4.31% <ø> (ø)
integration	18.10% <ø> (ø)
unit	76.72% <ø> (ø)

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