Py Bindings: Remove pointless borrowing of arguments

[ferdonline]

Context

Following the discussion in #3024 one better understood that

objects that are passed as arguments to C functions in an extension module that are called from Python; the call mechanism guarantees to hold a reference to every argument for the duration of the call.

(https://docs.python.org/3/c-api/intro.html#reference-counts)

Scope

Eliminate some unneeded borrows

[sonarcloud]

Quality Gate passed

Issues
0 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]

✔️ 96aba74 -> Azure artifacts URL

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.06%. Comparing base (d3a3758) to head (6c7c883).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3033      +/-   ##
==========================================
- Coverage   67.06%   67.06%   -0.01%     
==========================================
  Files         571      571              
  Lines      111318   111310       -8     
==========================================
- Hits        74658    74650       -8     
  Misses      36660    36660              

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[azure-pipelines]

✔️ c5bea14 -> Azure artifacts URL

[sonarcloud]

Quality Gate passed

Issues
0 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]

✔️ 6c7c883 -> Azure artifacts URL

[bbpbuildbot]

Logfiles from GitLab pipeline #238046 (:white_check_mark:) 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