Add and apply Naming/BlockForwarding rubocop rule

This syntax has been added in Ruby 3.1.

Not using a variable name might not be very descriptive, but it's just
as descriptive as using "block" as a variable name. Using just `&` we
get the same amount of information than using `&block`: that we're
passing a block.

We're still using `&action` in `around_action` methods because here we
aren't using a generic name for the variable, so (at least for now) we
aren't running this cop on controllers using `around_action`.

app/graphql/types/base_object.rb

@@ -1,7 +1,7 @@
 module Types
   class BaseObject < GraphQL::Schema::Object
-    def self.field(*args, **kwargs, &block)
-      super(*args, **kwargs, &block)
+    def self.field(*args, **kwargs, &)
+      super(*args, **kwargs, &)
 
       # The old api contained non-camelized fields
       # We want to support these for now, but throw a deprecation warning
@@ -14,7 +14,7 @@ module Types
       if field_name.to_s.include?("_")
         reason = "Snake case fields are deprecated. Please use #{field_name.to_s.camelize(:lower)}."
         kwargs = kwargs.merge({ camelize: false, deprecation_reason: reason })
-        super(*args, **kwargs, &block)
+        super(*args, **kwargs, &)
       end
 
       # Make sure associations only return public records