Fix unused block warnings for template methods

Ref: https://bugs.ruby-lang.org/issues/15554

Ruby 3.4 now warns when passing a block to a method that
never expects one.

In the case of rendered template, a block is always passed for
some engines that do expect one, but some never expect it.

We can silence that warning by declaring an anonymous block.

actionview/lib/action_view/template.rb

@@ -438,9 +438,13 @@ def compiled_source
 
         method_arguments =
           if set_strict_locals
-            "output_buffer, #{set_strict_locals}"
+            if set_strict_locals.include?("&")
+              "output_buffer, #{set_strict_locals}"
+            else
+              "output_buffer, #{set_strict_locals}, &_"
+            end
           else
-            "local_assigns, output_buffer"
+            "local_assigns, output_buffer, &_"
           end
 
         # Make sure that the resulting String to be eval'd is in the
@@ -505,6 +509,8 @@ def compile(mod)
           ![:keyreq, :key, :keyrest, :nokey].include?(parameter[0])
         end
 
+        non_kwarg_parameters.pop if non_kwarg_parameters.last == %i(block _)
+
         unless non_kwarg_parameters.empty?
           mod.undef_method(method_name)