[19.0.x] Unified release process

[eps1lon]

Backports #36456 to allow releasing 19.0.x from CI

test plan

Test release from the head of releases/19.0.x

$ yarn --cwd scripts/release install --frozen-lockfile
$ GH_TOKEN=$(gh auth token) scripts/release/prepare-release-from-ci.js --skipTests -r latest --commit=22fc5d0c3988ff32c83ab4e9b001939e6b5fd16e
$ scripts/release/publish.js --tag latest --dry
eslint-plugin-react-hooks 5.1.0 has already been published.
jest-react 0.16.0 has already been published.
react 19.0.6 has already been published.
react-art 19.0.6 has already been published.
react-dom 19.0.6 has already been published.
react-server-dom-webpack 19.0.6 has already been published.
react-server-dom-turbopack 19.0.6 has already been published.
react-is 19.0.6 has already been published.
react-reconciler 0.31.0 has already been published.
react-refresh 0.16.0 has already been published.
react-test-renderer 19.0.6 has already been published.
use-subscription 1.10.0 has already been published.
use-sync-external-store 1.4.0 has already been published.
scheduler 0.25.0 has already been published.
$ scripts/release/publish.js --tag latest --dry --onlyPackages react
react 19.0.6 has already been published.

[react-sizebot]

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