Upgrading to 5.27 hits fatal errors getting to the upgrade screen

In deploying the rc on a wordpress site just now I hit 3 places where DB queries failed before I could get to the upgrade screen (through the UI). One of these brought down the Wordpress site (a woo_commerce-civi api call) The problem is the new field civicrm_custom_field.serialize gets included in queries before it is in th DB

This patch got me there https://github.com/civicrm/civicrm-core/pull/17722 but drupal views is likely also an issue