[3.12] Convert doc.yml workflow to be reusable (GH-103914 + GH-105151)

[webknjaz]

Co-authored-by: Adam Turner 9087854+AA-Turner@users.noreply.github.com
Co-authored-by: Hugo van Kemenade hugovk@users.noreply.github.com.
(cherry picked from commit 88d14da)

Use CSV-separated outputs @ get-changed-files @ CI (#105151)

Co-authored-by: Hugo van Kemenade hugovk@users.noreply.github.com
(cherry picked from commit eaa6702)

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📚 Documentation preview 📚: https://cpython-previews--107042.org.readthedocs.build/

[webknjaz]

@AlexWaygood thanks for fixing the target branch, I overlooked that..

@ambv@pablogsal could you merge the first batch of the backports plz?

[AlexWaygood]

@ambv@pablogsal could you merge the first batch of the backports plz?

None of our CI has yet run on this PR. Since this change is purely focussed on improving our CI, it's important for the CI to run before we can think about merging this :)

[AlexWaygood]

@ambv@pablogsal could you merge the first batch of the backports plz?

None of our CI has yet run on this PR. Since this change is purely focussed on improving our CI, it's important for the CI to run before we can think about merging this :)

It passed after closing and reopening the PR.

[webknjaz]

None of our CI has yet run on this PR. Since this change is purely focussed on improving our CI, it's important for the CI to run before we can think about merging this :)

Ah, yeah. It's basically a prerequisite for another backport that will add alls-green to the supported branches too and will help @ambv enable the auto-merge feature.