Refactor upgrade detection and maintenance tasks

[carlos-reynosa]

There needs to be a process for detecting when a full upgrade is necessary versus only a db upgrade. The current db:status check is not adequate for detecting when maintenance is needed and in the future to detect when a full upgrade may be necessary.

Currently there does not seem a way to properly detect the need for a full upgrade. For example, changes in RabbitMQ configuration will require a full upgrade and thus the current process does not detect that and deployment failures occur. Magento has not released a way to detect this yet and it is in progress here: magento/magento2#39698

This change will allow for easier maintenance by developers now and in the future when we need to add additional conditions for detecting the need for full upgrades and not only partial db upgrades.

1. Update main tasks to run general upgrade process that runs either full upgrade or partial db upgrade
2. Update maintenance check to check for general upgrade needed status
3. Add full full_upgrade_needed variable will define if a full upgrade is necessary

• Bug fix #…?

• New feature?

• BC breaks?

• Tests added?

• Docs added?

  Please, regenerate docs by running next command:
  $ php bin/docgen