Fix ESP32 Tests

[ciband]

Summary

ESP32 test builds were not passing and the tests themselves were not
being compiled into the firmware binary. Added missing ignore filters
to ignore desktop libraries for building PIO and desktop targets in the
same source tree.

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

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[codecov]

Codecov Report

Merging #157 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #157   +/-   ##
========================================
  Coverage    97.92%   97.92%           
========================================
  Files            8        8           
  Lines          385      385           
========================================
  Hits           377      377           
  Misses           8        8

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