autorelations can't handle array-valued attributes

Describe the Bug

When using the regular autorequire to attribute value expression, like this:

diff --git a/lib/puppet/type/panos_address_group.rb b/lib/puppet/type/panos_address_group.rb
--
index 97a6cf4..e12e47d 100644
--- a/lib/puppet/type/panos_address_group.rb
+++ b/lib/puppet/type/panos_address_group.rb
@@ -54,4 +54,7 @@ DESC
autobefore: {
panos_commit: 'commit',
},
+  autorequire: {
+    panos_address: '$static_members',
+  }
)

where static_members is an array, the relation is set up to use the full array as title. Since titles can only be strings, this is wrong, and will lead to no actual relations being set up.

Expected Behavior

Defining an automatic relation based on an array-valued attribute should treat each element of the array as a potential relationship target.

Additional Context

This was originally reported as https://tickets.puppetlabs.com/browse/PDK-1094 - see there for additional logs & details.

Use the example in lib/puppet/type/panos_address_group.rb to reproduce the autorelation behavior with an array-valued static_members attribute. Trace the autorequire handling and its existing tests, if present. Done means each array element can be used as an individual relationship target rather than the whole array.