Skip state machine validation when using a function

[kddejong]

Issue #, if available:
fix #3769
Description of changes:

• skip validation of E3601 when using a function for the definition

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.76%. Comparing base (a5672f0) to head (28305d3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3770      +/-   ##
==========================================
- Coverage   93.77%   93.76%   -0.01%     
==========================================
  Files         362      362              
  Lines       12371    12375       +4     
  Branches     2527     2528       +1     
==========================================
+ Hits        11601    11604       +3     
  Misses        429      429              
- Partials      341      342       +1     

Flag	Coverage Δ
unittests	93.72% <100.00%> (-0.01%)	⬇️

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