Checkmk Werk 13988: fileinfo: Fix crash for user-configured state in case of missing file

ID: 13988 Title: fileinfo: Fix crash for user-configured state in case of missing file Component: Checks & agents Level: 1 Class: Bug fix Version: 2.2.0i1 The check plugin fileinfo reports UNKNOWN by default in case a file is missing. This behaviour is configurable via the option "State when file is missing" in the ruleset "Size and age of single files". However, if this option was used, the check plugin crashed with TypeError(f"'state' must be a checkmk State constant, got {state}") if the file was actually missing.