Allow all immutable collections from Java 11

A previous commit specifically allowed a limited subset of the immutable
classes that Java 11 introduced, but Jenkins should allow for all of
them to be serialized. Add them all to the default allow list of
classes.

core/src/main/resources/jenkins/security/whitelisted-classes.txt

@@ -105,6 +105,11 @@ java.util.HashMap
 java.util.HashSet
 java.util.Hashtable
 java.util.ImmutableCollections$List12
+java.util.ImmutableCollections$ListN
+java.util.ImmutableCollections$Map1
+java.util.ImmutableCollections$MapN
+java.util.ImmutableCollections$Set12
+java.util.ImmutableCollections$SetN
 java.util.LinkedHashMap
 java.util.LinkedHashSet
 java.util.LinkedList