CondaForgeYAMLCleanup: Extend to migrate to workflow_settings

[mgorny]

Description:

Extend CondaForgeYAMLCleanup minimigrator to convert a variety of deprecated keys into their workflow_settings counterparts. In general, the logic assumes that unless Azure and GHA values are both present and mismatched, we make the existing value provider-independent. This both keeps the resulting file simpler by avoiding unnecessary conditions, and ensures that Azure settings clearly get migrated after as we switch more default providers to GHA.

(Submitting early as a draft to get feedback on the design before I go too deep into the rabbit hole.)

Checklist:

• Pydantic model updated or no update needed

Tracking:

• store_build_artifacts ← azure.store_build_artifacts, github_actions.store_build_artifacts
• free_disk_space ← azure.free_disk_space, github_actions.free_disk_space
• tools_install_dir ← azure.settings_win.variables.MINIFORGE_HOME
• build_workspace_dir ← azure.settings_win.variables.CONDA_BLD_PATH
• (top-level) docker.run_args ← azure.settings_linux.variables.CONDA_FORGE_DOCKER_RUN_ARGS
• pagefile_size ← azure.settings_linux.swapfile_size, azure.settings_win.variables.SET_PAGEFILE
• resize_partitions ← github_actions.resize_win_partitions

Cross-refs, links to issues, etc:

[h-vetinari]

I like the overall idea!

[codecov]

Codecov Report

❌ Patch coverage is 98.52941% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.37%. Comparing base (0b0ae54) to head (c56e5d9).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...a_forge_tick/migrators/conda_forge_yaml_cleanup.py	97.59%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6240      +/-   ##
==========================================
+ Coverage   81.23%   81.37%   +0.13%     
==========================================
  Files         146      146              
  Lines       17484    17612     +128     
==========================================
+ Hits        14204    14331     +127     
- Misses       3280     3281       +1     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.