Add support for non-x86_64 CPU architectures

[martin-g]

It will still fail for architectures not supported by Miniconda.

[martin-g]

The PR is a draft because the installation still fails with:

...
The following NEW packages will be INSTALLED:

  _libgcc_mutex      pkgs/main/linux-aarch64::_libgcc_mutex-0.1-main
  _openmp_mutex      pkgs/main/linux-aarch64::_openmp_mutex-5.1-51_gnu
  brotlipy           pkgs/main/linux-aarch64::brotlipy-0.7.0-py39hfd63f10_1002
  ca-certificates    pkgs/main/linux-aarch64::ca-certificates-2022.3.29-hd43f75c_1
  certifi            pkgs/main/linux-aarch64::certifi-2021.10.8-py39hd43f75c_2
  cffi               pkgs/main/linux-aarch64::cffi-1.15.0-py39h9a3cfec_1
  charset-normalizer pkgs/main/noarch::charset-normalizer-2.0.4-pyhd3eb1b0_0
  colorama           pkgs/main/noarch::colorama-0.4.4-pyhd3eb1b0_0
  conda              pkgs/main/linux-aarch64::conda-4.12.0-py39hd43f75c_0
  conda-content-tru~ pkgs/main/noarch::conda-content-trust-0.1.1-pyhd3eb1b0_0
  conda-package-han~ pkgs/main/linux-aarch64::conda-package-handling-1.8.1-py39h2f4d8fa_0
  cryptography       pkgs/main/linux-aarch64::cryptography-36.0.0-py39h3d58568_0
  idna               pkgs/main/noarch::idna-3.3-pyhd3eb1b0_0
  ld_impl_linux-aar~ pkgs/main/linux-aarch64::ld_impl_linux-aarch64-2.36.1-h0ab8de2_3
  libffi             pkgs/main/linux-aarch64::libffi-3.3-h7c1a80f_2
  libgcc-ng          pkgs/main/linux-aarch64::libgcc-ng-10.2.0-h1234567_51
  libgomp            pkgs/main/linux-aarch64::libgomp-10.2.0-h1234567_51
  libstdcxx-ng       pkgs/main/linux-aarch64::libstdcxx-ng-10.2.0-h1234567_51
  ncurses            pkgs/main/linux-aarch64::ncurses-6.3-h2f4d8fa_2
  openssl            pkgs/main/linux-aarch64::openssl-1.1.1n-h2f4d8fa_0
  pip                pkgs/main/linux-aarch64::pip-21.2.4-py39hd43f75c_0
  pycosat            pkgs/main/linux-aarch64::pycosat-0.6.3-py39hfd63f10_2
  pycparser          pkgs/main/noarch::pycparser-2.21-pyhd3eb1b0_0
  pyopenssl          pkgs/main/noarch::pyopenssl-22.0.0-pyhd3eb1b0_0
  pysocks            pkgs/main/linux-aarch64::pysocks-1.7.1-py39hd43f75c_0
  python             pkgs/main/linux-aarch64::python-3.9.12-hc137634_0
  readline           pkgs/main/linux-aarch64::readline-8.1.2-h2f4d8fa_1
  requests           pkgs/main/noarch::requests-2.27.1-pyhd3eb1b0_0
  ruamel_yaml        pkgs/main/linux-aarch64::ruamel_yaml-0.15.100-py39h2f4d8fa_0
  setuptools         pkgs/main/linux-aarch64::setuptools-61.2.0-py39hd43f75c_0
  six                pkgs/main/noarch::six-1.16.0-pyhd3eb1b0_1
  sqlite             pkgs/main/linux-aarch64::sqlite-3.38.2-h6632b73_0
  tk                 pkgs/main/linux-aarch64::tk-8.6.11-h241ca14_0
  tqdm               pkgs/main/noarch::tqdm-4.63.0-pyhd3eb1b0_0
  tzdata             pkgs/main/noarch::tzdata-2022a-hda174b7_0
  urllib3            pkgs/main/noarch::urllib3-1.26.8-pyhd3eb1b0_0
  wheel              pkgs/main/noarch::wheel-0.37.1-pyhd3eb1b0_0
  xz                 pkgs/main/linux-aarch64::xz-5.2.5-hfd63f10_1
  yaml               pkgs/main/linux-aarch64::yaml-0.2.5-hfd63f10_0
  zlib               pkgs/main/linux-aarch64::zlib-1.2.12-h2f4d8fa_1


Preparing transaction: done
Executing transaction: done
installation finished.
Could not find conda environment: neutu-env
You can list all discoverable environments with `conda info --envs`.

Collecting package metadata (current_repodata.json): done
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

  - neutu-develop

Current channels:

  - https://conda.anaconda.org/flyem-forge/linux-aarch64
  - https://conda.anaconda.org/flyem-forge/noarch
  - https://conda.anaconda.org/conda-forge/linux-aarch64
  - https://conda.anaconda.org/conda-forge/noarch
  - https://repo.anaconda.com/pkgs/main/linux-aarch64
  - https://repo.anaconda.com/pkgs/main/noarch
  - https://repo.anaconda.com/pkgs/r/linux-aarch64
  - https://repo.anaconda.com/pkgs/r/noarch

To search for alternate channels that may provide the conda package you're
looking for, navigate to

    https://anaconda.org

and use the search bar at the top of the page.

Any hints whether the above could be fixed/worked around somehow ?