[BUGFIX] Restore serialization with HttpException inline responses

Problem/Motivation

When trying to serialize the response for caching purposes, if the response contains a HttpException (like a 403 because denied access) then the following error is thrown:

The website encountered an unexpected error. Please try again later.

LogicException: Settings can not be serialized. This probably means you are serializing an object that has an indirect reference to the Settings object. Adjust your code so that is not necessary. in Drupal\Core\Site\Settings->__sleep() (line 62 of core/lib/Drupal/Core/Site/Settings.php).
serialize(Object) (Line: 1)
Drupal\Core\Cache\DatabaseBackend::doSetMultiple() (Line: 211)
Drupal\Core\Cache\DatabaseBackend->doSetMultiple(Array) (Line: 164)
Drupal\Core\Cache\DatabaseBackend->setMultiple(Array) (Line: 154)
Drupal\Core\Cache\DatabaseBackend->set('response:[request_format]=api_json:[route]=api.dynamic.node--article.collection35786c7117b4e38d0f169239752ce71158266ae2f6e4aa230fbbb87bd699c0e3:[url.query_args:fields]=node--article=nid:[url.query_args:filter]=:[url.query_args:include]=:[url.query_args:page]=size=3:[url.query_args:sort]=nid:[url.site]=http://d8dev.local:[user.permissions]=ee71ba8b50bc19650349becb39a9f3e27c85f3742690b3e37d7d2ccb9fb9fcd4', Array, -1, Array) (Line: 269)
Drupal\Core\Render\RenderCache->set(Array, Array) (Line: 127)
Drupal\Core\Render\PlaceholderingRenderCache->set(Array, Array) (Line: 200)
Drupal\dynamic_page_cache\EventSubscriber\DynamicPageCacheSubscriber->onResponse(Object, 'kernel.response', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.response', Object) (Line: 184)
Symfony\Component\HttpKernel\HttpKernel->filterResponse(Object, Object, 1) (Line: 166)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 64)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 99)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 654)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Proposed resolution

Track down the settings dependency in the response data and remove the dependency upon serialization.