ros: make linter tests more flexible

[mr-cal]

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• Have you successfully run pytest tests/unit?

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Adds some flexibility to the linter-ros2-humble-mixed spread test, which has been failing due to a set of 7 libraries appearing and disappearing from the list of unused libraries:

• tests: update linter-ros2-humble-mixed spread test #4113
• fix(linter-ros2-humble-mixed): change expected output since new pytho… #4184
• ros: remove generator warnings from linter spread tests #4202
• Revert "ros: remove linter warnings from spread tests (#4202)" #4212

[codecov-commenter]

Codecov Report

Merging #4223 (4f2efca) into main (421fd64) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##             main    #4223   +/-   ##
=======================================
  Coverage   93.90%   93.90%           
=======================================
  Files         569      569           
  Lines       43746    43746           
=======================================
  Hits        41078    41078           
  Misses       2668     2668           

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