Adds check for default objects

[linguini-dev]

After #270, PCW also cleans up network objects (Firewall rules, Routes, VPCs and etc.).

We do not want to delete the default routes of the networks - https://progress.opensuse.org/issues/174262.

This PR adds a general check if the object has default in the name.

Example run:

2025-02-04 09:23:32,296 ocw.lib.gce  DEBUG    [ccoe] Routes cleanup
2025-02-04 09:23:32,641 ocw.lib.gce  DEBUG    [ccoe] 3 routes found
2025-02-04 09:23:32,685 ocw.lib.gce  INFO     [ccoe] Skipped deletion of default route default-route-155840a10ef83e70
2025-02-04 09:23:32,685 ocw.lib.gce  INFO     [ccoe] Skipped deletion of default route default-route-63d1541d1fcd3a75
2025-02-04 09:23:32,685 ocw.lib.gce  INFO     [ccoe] Skipped deletion of default route default-route-9c0a0f17c748564a