Fix more upgrade issues
Use :recycle of :asdf/find-system in :asdf/source-registry to migrate symbol initialize-source-registry that moved from that previous packages (otherwise, upgrade from 3.2.1 breaks on all lisps). Also :recycle :asdf/action in :asdf/plan for required-components and traverse-action. But avoid interning plan in asdf/action so it doesn't confuse clisp when upgrading from 2.26(!).
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