fix: fix getname on array symbolic functions with interpolated names

[AayushSabharwal]

Close SciML/ModelingToolkitNeuralNets.jl#58

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.55%. Comparing base (6bb855d) to head (96f7a27).
⚠️ Report is 5 commits behind head on master.
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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1673      +/-   ##
==========================================
+ Coverage   80.53%   80.55%   +0.02%     
==========================================
  Files          56       56              
  Lines        5785     5792       +7     
==========================================
+ Hits         4659     4666       +7     
  Misses       1126     1126              

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