Make RC releases as tagged releases

[asfimport]

When we make RC releases, we should also make a tagged release on NPM instead of a full release. http://npm.github.io/publishing-pkgs-docs/updating/using-tags.html

Reporter: Dominik Moritz / @domoritz

_{Note: This issue was originally created as ARROW-14507. Please see the migration documentation for further details.}

[domoritz]

Would be nice but no-one has the cycles for this right now.