hook_field_update_forbid() and FieldUpdateForbiddenException renamed to hook_field_config_update_forbid() and FieldConfigUpdateForbiddenException

Following the rename of config entity type for "field storage definitions" ("$field" in Drupal 7) to 'field_storage_config':
- hook_field_update_forbid() has been renamed to hook_field_storage_config_update_forbid().
- Drupal\field\FieldUpdateForbiddenException has been renamed to Drupal\field\FieldStorageConfigUpdateForbiddenException.

7.x

function mymodule_field_update_forbid($field, $prior_field, $has_data) {
  if ($has_data) {
    throw new FieldUpdateForbiddenException("Cannot update a list field not to include keys with existing data");
  }
}

8.x

use Drupal\field\FieldStorageConfigInterface;
use Drupal\field\FieldStorageConfigUpdateForbiddenException;

function mymodule_field_storage_config_update_forbid(FieldStorageConfigInterface $field, FieldStorageConfigInterface $prior_field) {
  if ($field->hasData()) {
    throw new FieldStorageConfigUpdateForbiddenException("Cannot update a list field not to include keys with existing data");
  }
}