Mutation tracker should be cleared before continuing around callbacks

`changes_applied` should be called before continuing around callback
chain. Otherwise the mutation tracker returns old value for methods like
`changed`? or `id_in_database` in around callbacks. Also methods depend
on `id_in_database`, like `update_column`, are not working in
`around_create` callbacks.

```
class Foo < ActiveRecord::Base
  around_create :around_create_callback

  def around_create_callback
    ...
    yield
    p id_in_database # => nil
    update_column(:generated_column, generate_value) # silently fails
  end

  ...
end
```

1 files changed, 6 insertions, 5 deletions

diff --git a/activerecord/lib/active_record/attribute_methods/dirty.rb b/activerecord/lib/active_record/attribute_methods/dirty.rb
index 233ee29fac..bc25837fab 100644
--- a/activerecord/lib/active_record/attribute_methods/dirty.rb
+++ b/activerecord/lib/active_record/attribute_methods/dirty.rb
@@ -16,9 +16,6 @@ module ActiveRecord
 
         class_attribute :partial_writes, instance_writer: false, default: true
 
-        after_create { changes_applied }
-        after_update { changes_applied }
-
         # Attribute methods for "changed in last call to save?"
         attribute_method_affix(prefix: "saved_change_to_", suffix: "?")
         attribute_method_prefix("saved_change_to_")
@@ -168,11 +165,15 @@ module ActiveRecord
         end
 
         def _update_record(*)
-          partial_writes? ? super(keys_for_partial_write) : super
+          affected_rows = partial_writes? ? super(keys_for_partial_write) : super
+          changes_applied
+          affected_rows
         end
 
         def _create_record(*)
-          partial_writes? ? super(keys_for_partial_write) : super
+          id = partial_writes? ? super(keys_for_partial_write) : super
+          changes_applied
+          id
         end
 
         def keys_for_partial_write