[2.2.0] Checkmk Werk 16758 created: host_config: validate datatype for host attribute properly

Title: host_config: validate datatype for host attribute properly Class: fix Compatible: compat Component: rest-api Date: 1715683355 Edition: cre Level: 1 Version: 2.2.0p27 Prior to this werk, the datatype was not properly validated allowing wrong values to be specified for host attributes. For instance, the parent attribute allowed a string instead of a list of strings which subsequently led to an internal error. This werk fixes this issue.