[Backport] version bumps and prdocs reordering 1.9.0 (#3758)
This PR backports: - node version bump - `spec_vesion` bump - reordering of the `prdocs` to the appropriate folder from the `1.9.0` release branch
This PR backports: - node version bump - `spec_vesion` bump - reordering of the `prdocs` to the appropriate folder from the `1.9.0` release branch