Simplify with the new nb::bytearray

[alkino]

No description provided.

[1uc]

Very nice work. Let's fix the leak and then apply this modernization:
#3229

(just in case nanobind does something weird, it'll be nice to know if it's refcounting related or not.)

[1uc]

We'll need to remember to rebase outstanding PRs diligently to make sure they run against the new version of nanobind.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.07%. Comparing base (e8255b9) to head (3824d9c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3230      +/-   ##
==========================================
- Coverage   67.07%   67.07%   -0.01%     
==========================================
  Files         569      569              
  Lines      111155   111150       -5     
==========================================
- Hits        74559    74554       -5     
  Misses      36596    36596              

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[azure-pipelines]

✔️ 649d4a4 -> 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 SonarQube Cloud

[bbpbuildbot]

Logfiles from GitLab pipeline #238916 (: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

[azure-pipelines]

✔️ 3824d9c -> Azure artifacts URL