[3.12] GH-103484: Fix permanently redirects reported by linkcheck (GH-124144) (GH-124152)

Fix redirects reported by linkcheck, update docs conf.py checks.
(cherry picked from commit 0a32c6959c265d21d7c43fe8e4aefc8c0983e85e)

Co-authored-by: Rafael Fontenelle <rffontenelle@users.noreply.github.com>