Changes from 06e5872189 made it possible to update tar from 6.x to 7.x and use new `package.json` exports that are included in 7.x, allowing us to further reduce our bundle size.
Force users to opt-in into the package managers they want to support.
As more and more package managers are added to Corepack, it's more and
more unlikely that our users will be interested in _all_ the package
managers Corepack supports, and it is unreasonable to expect Corepack
maintainers would be able to perform security audits.