[3.10] gh-93925: Improve clarity of sqlite3 commit/rollback, and close docs (GH-93926) (#94011)

Co-authored-by: CAM Gerlach <CAM.Gerlach@Gerlach.CAM>.
(cherry picked from commit 6446592c89b0c581c00e170ae6278291e940755c)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>