main/docbook-x*: fix deinstall scripts

This fixes a few problems with the deinstall scripts but unfortunately not all.

The etc/xml/catalog file is still left behind on deinstall but with less content.

assigned to @ncopa

added 74 commits

• e0a099d0...328f50db - 73 commits from branch alpine:master
• 14ada951 - main/docbook-x*: fix deinstall scripts

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merged