Add intersects? to Relation

Ruby 3.1 added `intersects?` which is equivalent to `(a & b).any?`. Rubocop added a corresponding cop, `Style/ArrayIntersect`, which transforms the old style to use `intersect?`. Unfortunately as `intersects?` is not delegated on `CollectionProxy`, this leads to false positives that need to be disabled for no good reason other than the fact the method isn't delegated.

This PR add delegation of `intersects?` to `Relation` which fixes this.

activerecord/CHANGELOG.md

@@ -1,3 +1,11 @@
+*   Add support for `Array#intersect?` to `ActiveRecord::Relation`.
+
+    `Array#intersect?` is only available on Ruby 3.1 or later.
+
+    This allows the Rubocop `Style/ArrayIntersect` cop to work with `ActiveRecord::Relation` objects.
+
+    *John Harry Kelly*
+
 *   The deferrable foreign key can be passed to `t.references`.
 
     *Hiroyuki Ishii*

activerecord/lib/active_record/relation/delegation.rb

@@ -97,7 +97,7 @@ def #{method}(...)
     # may vary depending on the klass of a relation, so we create a subclass of Relation
     # for each different klass, and the delegations are compiled into that subclass only.
 
-    delegate :to_xml, :encode_with, :length, :each, :join,
+    delegate :to_xml, :encode_with, :length, :each, :join, :intersects?,
              :[], :&, :|, :+, :-, :sample, :reverse, :rotate, :compact, :in_groups, :in_groups_of,
              :to_sentence, :to_fs, :to_formatted_s, :as_json,
              :shuffle, :split, :slice, :index, :rindex, to: :records

activerecord/test/cases/relation/delegation_test.rb

@@ -9,7 +9,7 @@
 module ActiveRecord
   module DelegationTests
     ARRAY_DELEGATES = [
-      :+, :-, :|, :&, :[], :shuffle,
+      :+, :-, :|, :&, :[], :shuffle, :intersects?,
       :all?, :collect, :compact, :detect, :each, :each_cons, :each_with_index,
       :exclude?, :find_all, :flat_map, :group_by, :include?, :length,
       :map, :none?, :one?, :partition, :reject, :reverse, :rotate,