[AV-93910] Document App Services Compatibility setting (#320)

* Add setting entry to functions settings

* Add edit functions and update settings table

Author: dgnicholson

modules/eventing/pages/add-eventing-functions.adoc

@@ -90,6 +90,11 @@ When you set the Feed Boundary to `From Now`, the Function is only invoked on fu
 |Language Compatibility
 |The language version of the handler for backward compatibility.
 
+|Enable App Services Compatibility
+|Select this option only when using App Services with the same collection as this Eventing Function, as it prevents duplicate processing.
+
+This setting is selected by default and mandatory when an App Service already links to the Eventing Function's chosen collection.
+
 |===
 
 For more information about terminology, see xref:eventing-terminologies.adoc[Eventing terminology].

modules/eventing/pages/manage-eventing-functions.adoc

@@ -158,6 +158,9 @@ To edit a larger number of your Function's settings, undeploy or pause your Func
 |Language Compatibility
 |Can only be edited when the Function is in an undeployed or paused state.
 
+|Enable App Services Compatibility
+|Can only be edited when the Function does not share the same collection as an App Service.
+
 |===