Bump linzer to 0.7.7 (#35258)

config/initializers/linzer.rb

@@ -5,24 +5,14 @@ require 'linzer/message/adapter/http_gem/response'
 
 module Linzer::Message::Adapter
   module ActionDispatch
-    class Response < Linzer::Message::Adapter::Abstract
-      def initialize(operation, **_options) # rubocop:disable Lint/MissingSuper
-        @operation = operation
-      end
-
-      def header(name)
-        @operation.headers[name]
-      end
-
-      def attach!(signature)
-        signature.to_h.each { |h, v| @operation.headers[h] = v }
-      end
+    class Response < Linzer::Message::Adapter::Generic::Response
+      private
 
       # Incomplete, but sufficient for FASP
-      def [](field_name)
-        return @operation.status if field_name == '@status'
-
-        @operation.headers[field_name]
+      def derived(name)
+        case name.value
+        when '@status' then @operation.status
+        end
       end
     end
   end