refs #22208 [fid] vf6: tab configuration via ini-file

* see also refs #21611
* add fid ini-files inheriting from finc

fid/config/vufind/CollectionTabs.ini

+;####################################################################
+;##################### DO NOT DELETE THIS HEADER ####################
+;################### Leipzig University Library © 2022 ##############
+;
+; This is the ISIL-instance-specific default INI-file and inherits
+; all the settings from the INI-file defined in [Parent_Config] which
+; points to the default INI-file located in the folder vufind2/local
+;
+
+[Parent_Config]
+relative_path = ../../../local/config/vufind/CollectionTabs.ini
\ No newline at end of file

fid/config/vufind/RecordTabs.ini

+;####################################################################
+;##################### DO NOT DELETE THIS HEADER ####################
+;################### Leipzig University Library © 2022 ##############
+;
+; This is the ISIL-instance-specific default INI-file and inherits
+; all the settings from the INI-file defined in [Parent_Config] which
+; points to the default INI-file located in the folder vufind2/local
+;
+
+[Parent_Config]
+relative_path = ../../../local/config/vufind/RecordTabs.ini
\ No newline at end of file