Our daily tests CI job runs some additional tests that are too slow or
too flaky to be run for every merge requests. Before doing a release
it's a good idea to run this workflow manually to make sure there aren't
any lurking regressions that `cargo hack` or another test from this
workflow could catch pre-release.
This commit adds that guidance to `RELEASING.md` for future releases.
This commit adds some short guidance on performing maintenance point
releases when `main` has breaking changes, preventing using the normal
release process.