perl-xml-libxml: build for linux-aarch64 and osx-arm64

[luizirber]

Enable linux-aarch64 and osx-arm64 builds as part of #52171

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[luizirber]

alas, this recipe is in the skiplist, so builds don't work. And should probably be moved to conda-forge instead, following the discussion in conda-forge/staged-recipes#25110