Revert "Link versioned keg-only formulae by default"

[scpeters]

This reverts commit f383ae2 due to regressions in linking non-keg-only dependencies of installed formulae. See discussion in #21676 (comment) and example failure in Homebrew/homebrew-core#271015.

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[MikeMcQuaid]

@scpeters @carlocab @cho-m Thanks for quick work reverting this. Another go in #21684

[scpeters]

thanks!