Add allocations to template renderer subscription

This PR adds the allocations to the instrumentation for template and
partial rendering.

Before:

```
  Rendering posts/new.html.erb within layouts/application
  Rendered posts/_form.html.erb (9.7ms)
  Rendered posts/new.html.erb within layouts/application (10.9ms)
Completed 200 OK in 902ms (Views: 890.8ms | ActiveRecord: 0.8ms)
```

After:

```
  Rendering posts/new.html.erb within layouts/application
  Rendered posts/_form.html.erb (Duration: 7.1ms | Allocations: 6004)
  Rendered posts/new.html.erb within layouts/application (Duration: 8.3ms | Allocations: 6654)
Completed 200 OK in 858ms (Views: 848.4ms | ActiveRecord: 0.4ms | Allocations: 1539564)
```

1 files changed, 3 insertions, 3 deletions

diff --git a/actionview/lib/action_view/log_subscriber.rb b/actionview/lib/action_view/log_subscriber.rb
index db07b9d7fb..227f025385 100644
--- a/actionview/lib/action_view/log_subscriber.rb
+++ b/actionview/lib/action_view/log_subscriber.rb
@@ -18,7 +18,7 @@ module ActionView
       info do
         message = +"  Rendered #{from_rails_root(event.payload[:identifier])}"
         message << " within #{from_rails_root(event.payload[:layout])}" if event.payload[:layout]
-        message << " (#{event.duration.round(1)}ms)"
+        message << " (Duration: #{event.duration.round(1)}ms | Allocations: #{event.allocations})"
       end
     end
 
@@ -26,7 +26,7 @@ module ActionView
       info do
         message = +"  Rendered #{from_rails_root(event.payload[:identifier])}"
         message << " within #{from_rails_root(event.payload[:layout])}" if event.payload[:layout]
-        message << " (#{event.duration.round(1)}ms)"
+        message << " (Duration: #{event.duration.round(1)}ms | Allocations: #{event.allocations})"
         message << " #{cache_message(event.payload)}" unless event.payload[:cache_hit].nil?
         message
       end
@@ -37,7 +37,7 @@ module ActionView
 
       info do
         "  Rendered collection of #{from_rails_root(identifier)}" \
-        " #{render_count(event.payload)} (#{event.duration.round(1)}ms)"
+        " #{render_count(event.payload)} (Duration: #{event.duration.round(1)}ms | Allocations: #{event.allocations})"
       end
     end