test: Remove duplicate bridging headers

[philipphofmann]

Merge two lists of the bridging headers and remove duplicates.

#skip-changelog

Closes #6145

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.631%. Comparing base (52603c5) to head (241cd46).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #6144       +/-   ##
=============================================
- Coverage   86.637%   86.631%   -0.006%     
=============================================
  Files          435       435               
  Lines        36983     36983               
  Branches     17394     17391        -3     
=============================================
- Hits         32041     32039        -2     
- Misses        4897      4898        +1     
- Partials        45        46        +1     

see 7 files with indirect coverage changes

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[philprime]

LGTM