test: adding precedence order test

[Freyskeyd]

Description

This PR adds a non regression test on the precedence check order of source stream certificatees

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[gruberb]

👍

[dvdplm]

@Freyskeyd Is this PR still relevant or can we close it?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (591180d) 59.82% compared to head (1ccd254) 62.63%.
Report is 29 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #303      +/-   ##
==========================================
+ Coverage   59.82%   62.63%   +2.80%     
==========================================
  Files         230      218      -12     
  Lines       11991    11876     -115     
==========================================
+ Hits         7174     7438     +264     
+ Misses       4817     4438     -379     

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