Issue #2018375 by andypost: Get rid of node_hook() and node_invoke().

core/modules/field/field.api.php

core/modules/forum/forum.module

core/modules/node/content_types.inc

core/modules/node/lib/Drupal/node/NodeFormController.php

core/modules/node/lib/Drupal/node/NodeRenderController.php

core/modules/node/lib/Drupal/node/NodeStorageController.php

core/modules/node/node.api.php

core/modules/node/node.module

core/modules/node/node.pages.inc

core/modules/search/search.module

core/modules/system/system.api.php