Drop Python 3.10 support

[NicolaCourtier]

Description

Drop support for Python 3.10 ⚠️ after next release ⚠️.

Fixes #992

Type of change

Please add a line in the relevant section of CHANGELOG.md to document the change (include PR #).

Important checks:

Please confirm the following before marking the PR as ready for review:

• No style issues: $ pre-commit run or $ nox -s pre-commit (see CONTRIBUTING.md for how to set this up to run automatically when committing locally, in just two lines of code)
• All tests pass: nox -s tests
• The documentation builds: nox -s doctest
• Code is commented for hard-to-understand areas
• Tests added that prove fix is effective or that feature works

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.90%. Comparing base (2b63b96) to head (bcff20e).

Additional details and impacted files

@@                 Coverage Diff                  @@
##           support-python-3.15     #993   +/-   ##
====================================================
  Coverage                92.90%   92.90%           
====================================================
  Files                       84       84           
  Lines                     6777     6777           
====================================================
  Hits                      6296     6296           
  Misses                     481      481           

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