👷 CI Restructuring

[marcelwa]

Description

This PR restructures the CI system to reduce the amount of runners spawned.

• Deprecate macOS-12 support
• Merge Debug and Release pipelines for all workflows into single runners for performance reasons

Additional changes:

• Bump Python in the runners to 3.10

Checklist:

• The pull request only contains commits that are related to it.
• I have added appropriate tests and documentation.
• I have created/adjusted the Python bindings for any new or updated functionality.
• I have made sure that all CI jobs on GitHub pass.
• The pull request introduces no new warnings and follows the project's style guidelines.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.29%. Comparing base (9becc3a) to head (a9d6b66).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #418      +/-   ##
==========================================
- Coverage   98.32%   98.29%   -0.04%     
==========================================
  Files         209      209              
  Lines       28308    28307       -1     
  Branches     1290     1292       +2     
==========================================
- Hits        27834    27824      -10     
- Misses        474      483       +9     

see 4 files with indirect coverage changes

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