Print add_nrn_has_net_event.

[1uc]

Needed for #1353.

[bbpbuildbot]

Logfiles from GitLab pipeline #224174 (:white_check_mark:) have been uploaded here!

Status and direct links:

• ✅ spack_setup
• ✅ build:intel
• ✅ build:nvhpc
• ✅ test:intel
• ✅ test:nvhpc

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 86.81%. Comparing base (10788d7) to head (38159ef).

Files	Patch %	Lines
src/codegen/codegen_neuron_cpp_visitor.cpp	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1375      +/-   ##
==========================================
- Coverage   86.82%   86.81%   -0.01%     
==========================================
  Files         179      179              
  Lines       13685    13687       +2     
==========================================
+ Hits        11882    11883       +1     
- Misses       1803     1804       +1     

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