[MRG] Move build system over to poetry

[scaramallion]

Reference issue

• Moves build system over to pyproject.toml + poetry, removes extraneous files
• Closes Python 3.11 SetuptoolsDeprecationWarning #794, closes The CI/CD has very sensitive dependencies on the versions of the tools being used for checking the code #839
• Version bump to 2.2.0.dev0

TODO

• Rewrite the the publish-pypi-deploy.yml workflow
• Update the dev installation instructions

Tasks

• Fix or feature added
• Documentation and examples updated (if relevant)
• Unit tests passing and coverage at 100% after adding fix/feature
• Type annotations updated and passing with mypy
• Apps updated and tested (if relevant)

[codecov]

Codecov Report

Merging #876 (bdd4cc6) into master (4972781) will not change coverage.
The diff coverage is 100.00%.

❗ Current head bdd4cc6 differs from pull request most recent head adcf6d4. Consider uploading reports for the commit adcf6d4 to get more accurate results

@@            Coverage Diff            @@
##            master      #876   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           28        28           
  Lines         8621      8621           
=========================================
  Hits          8621      8621           

Files	Coverage Δ
pynetdicom/_version.py	100.00% <100.00%> (ø)