Revert "Revert "Merge branch 'brent-master-patch-66860' into 'master'""

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!196

fix(build): BrainScaleS on modern py-pybind11 (another try)

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!200

This one includes a fix in hxtorch that wasn't caught when testing
locally (at UHEI) against newer pybind11 versions.

This reverts merge request !199

codejam demo

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!199

This reverts merge request !198

Codejam test

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!198

This reverts merge request !195

Test drive new py-pybind11

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!197

This reverts commit 383726f9

Disable some Python bindings in {hxtorch,pynn-brainscales}

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!195

This is a workaround for pysctrltp not detecting newer versions
of pybind11 correctly, and for `pyhxcomm` building a test binary linking
against stuff which requires linkage against libpython.
The real fix requires CR within the software stack and will only be
available later.

Bugfix for NEST installation with Python other than 3.8

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!192

This reverts merge request !189

This reverts commit 567e3819

Add Arbor v0.8

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!189

Add recent versions of fmt, py-pybind11 needed for arbor@0.8 from spack v0.19.0 upstream

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!191

Update packages/py-pybind11/package.py, packages/fmt/fmt-attributes-cpp11_4.1.0.patch, packages/fmt/fmt-no-export-cpp11flag_3.0.0.patch, packages/fmt/fmt-use-cmake-cxx-standard_3.0.0.patch, packages/fmt/package.py

Update packages/py-snudda/package.py to version 1.3.2

See merge request technical-coordination/project-internal/devops/platform/ebrains-spack-builds!187