[2.1.0] Checkmk Werk 17152 created: Re-introduce missing requirement documentation for interface check

Title: Re-introduce missing requirement documentation for interface check Class: fix Compatible: compat Component: checks Date: 1722352726 Edition: cre Level: 1 Version: 2.1.0p47 During consolidation of various interface checks, necessary prerequisites for the Solaris and HP-UX were omitted from the documentation. In this werk, https://checkmk.com/integrations/interfaces is updated include the necessary prerequisites to monitor network interfaces on all operating systems again.