[PR #11643 backport][3.13] Move dependency metadata from setup.cfg to pyproject.toml

[cdce8p]

This is a backport of PR #11643 as merged into master (e1aec0a).

Modified the backport to include attrs again as present on the 3.13 branch.

[codspeed-hq]

CodSpeed Performance Report

Merging #11735 will not alter performance

_{Comparing cdce8p:move-dependencies-3.13 (75d2f7e) with 3.13 (3f0a963)}

Summary

✅ 59 untouched

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.26%. Comparing base (91547df) to head (75d2f7e).
⚠️ Report is 2 commits behind head on 3.13.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.13   #11735   +/-   ##
=======================================
  Coverage   98.26%   98.26%           
=======================================
  Files         128      128           
  Lines       44035    44035           
  Branches     2393     2393           
=======================================
  Hits        43269    43269           
  Misses        589      589           
  Partials      177      177           

Flag	Coverage Δ
CI-GHA	98.14% <ø> (ø)
OS-Linux	97.90% <ø> (ø)
OS-Windows	95.61% <ø> (ø)
OS-macOS	97.14% <ø> (-0.01%)	⬇️
Py-3.10.11	96.67% <ø> (ø)
Py-3.10.18	97.17% <ø> (+<0.01%)	⬆️
Py-3.11.13	97.36% <ø> (-0.01%)	⬇️
Py-3.11.9	96.86% <ø> (ø)
Py-3.12.10	96.95% <ø> (ø)
Py-3.12.11	97.45% <ø> (ø)
Py-3.13.7	97.45% <ø> (+<0.01%)	⬆️
Py-3.13.9	96.93% <ø> (-0.01%)	⬇️
Py-3.14.0	97.66% <ø> (-0.01%)	⬇️
Py-3.14.0t	96.75% <ø> (+<0.01%)	⬆️
Py-3.9.13	96.57% <ø> (ø)
Py-3.9.23	97.07% <ø> (+<0.01%)	⬆️
Py-pypy3.9.19-7.3.16	85.40% <ø> (-6.44%)	⬇️
VM-macos	97.14% <ø> (-0.01%)	⬇️
VM-ubuntu	97.90% <ø> (ø)
VM-windows	95.61% <ø> (ø)

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