Use Printf/Fprintf instead of std::cout, std::cerr

[alkino]

This way this is possible to redirect the flux for matlab and jupyter

[1uc]

There's a couple of occurrences where a newline is stripped. I stopped after a few. Please check them all again.

[matz-e]

It's almost like there should be a println and eprintln to print with a line ending on std{out,err} :)

[bbpbuildbot]

Logfiles from GitLab pipeline #230763 (:no_entry:) have been uploaded here!

Status and direct links:

• ✅ mac_m1_cmake_build: [cmake, ON, OFF, OFF, address]
• ✅ spack_setup
• ✅ build:nmodl
• ⛔ build:neuron:nmodl:intel:legacy
• ⛔ build:neuron:nmodl:intel:shared
• ✅ build:neuron:nmodl:nvhpc:acc:legacy
• ✅ build:neuron:nmodl:nvhpc:acc:shared
• ✅ build:neuron:nmodl:nvhpc:omp:legacy
• ✅ build:neuron:nmodl:nvhpc:omp
• ⏩ test:neuron:nmodl:intel:legacy
• ⏩ test:neuron:nmodl:intel:shared
• ✅ test:neuron:nmodl:nvhpc:acc:legacy
• ✅ test:neuron:nmodl:nvhpc:acc:shared
• ✅ test:neuron:nmodl:nvhpc:omp:legacy
• ✅ test:neuron:nmodl:nvhpc:omp

[sonarcloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[azure-pipelines]

✔️ afaf919 -> Azure artifacts URL

[codecov]

Codecov Report

Attention: Patch coverage is 36.84211% with 24 lines in your changes missing coverage. Please review.

Project coverage is 67.27%. Comparing base (8e3de33) to head (afaf919).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/nrniv/nrnpy.cpp	37.50%	10 Missing ⚠️
src/nrnoc/init.cpp	0.00%	3 Missing ⚠️
src/oc/hoc.cpp	25.00%	3 Missing ⚠️
src/ivoc/strfun.cpp	0.00%	2 Missing ⚠️
src/nrniv/nrncore_write/utils/nrncore_utils.cpp	0.00%	1 Missing ⚠️
src/nrnmpi/memory_usage.cpp	0.00%	1 Missing ⚠️
src/nrnoc/treeset.cpp	0.00%	1 Missing ⚠️
src/nrnpython/nrnpy_p2h.cpp	0.00%	1 Missing ⚠️
src/nrnpython/nrnpython.cpp	0.00%	1 Missing ⚠️
src/oc/hoc_oop.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3073   +/-   ##
=======================================
  Coverage   67.26%   67.27%           
=======================================
  Files         571      571           
  Lines      104867   104874    +7     
=======================================
+ Hits        70542    70550    +8     
+ Misses      34325    34324    -1     

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