Build project with build & pyproject.toml

[jwodder]

dandi-archive is currently building its tarballs via python setup.py, which is deprecated and which is not the currently supported way to build with the setuptools_scm build-time requirement (used for storing the Git tag in the project version).

Indeed, the latest "Deploy backend to production run" has the following in the logs for the "Build app into tarball" step:

/usr/lib/python3/dist-packages/setuptools/installer.py:27: SetuptoolsDeprecationWarning: setuptools.installer is deprecated. Requirements should be satisfied by a PEP 517 installer.
  warnings.warn(
/home/runner/work/dandi-archive/dandi-archive/.eggs/setuptools_scm-8.0.4-py3.10.egg/setuptools_scm/_integration/setuptools.py:30: RuntimeWarning: 
ERROR: setuptools==59.6.0 is used in combination with setuptools_scm>=8.x

Your build configuration is incomplete and previously worked by accident!
setuptools_scm requires setuptools>=61

Suggested workaround if applicable:
 - migrating from the deprecated setup_requires mechanism to pep517/518
   and using a pyproject.toml to declare build dependencies
   which are reliably pre-installed before running the build tools

[dandibot]

🚀 PR was released in v0.3.75 🚀