System test: Check files after WPK upgrade roollback

[Rebits]

Description

It was detected that the installation restoring process or rollback, performed after a WPK upgrade fail, was not working as expected.

Currently, there are defined tests for checking the WPK upgrade rollback. The test_wpk_agent has a test case for ensuring the correct behaviour of the rollback. However, this does not check the Wazuh internal files after rollback and it uses deprecated RemotedSimulator and AuthdSimulator. For this reason, it is necessary to implement a new system test to check the correct behaviour of the rollback in Windows and Linux agents.

These new tests should use the existing tools developed for https://github.com/wazuh/wazuh-qa/issues/2231.

Test requirements

• Windows/Linux support
• Check former files are correctly restored, none is lost, they have the same user; group and permissions as before and, if it applies, they should preserve its file size.
• Agent reconnects automatically to the manager after being restored.
• Wazuh service is configured and the process starts automatically when rebooting the system.
• The permissions, owners and groups of the following directories do NOT change:
  • /
  • /var/
  • /usr/ /usr/lib/ /usr/lib/systemd/ /usr/lib/systemd/system/
  • /etc / /etc/systemd/ /etc/systemd/system/ /etc/init.d/ /etc/rc.d/init.d/