action #42854: [functional][y][epic] Introduce relevant installation validation test modules
[functional][y] Add validation to cryptlvm+cancel_existing scenario
See motivation in the parent ticket.
This scenario is special about ignoring encrypted partitions. It doesn't make sense to validate this after installation is conducted, as disk will be wiped out.
Nevertheless, we can check that disk is not activated and existing partition are not visible.
We might have issues with switching consoles on powerVM, fixing it is out f scope of this ticket and in this case we should create follow up task.
See #68962 for the approach we have used in cryptlvm+activate_existing
- Ignorance of the encrypted partitions is validated
- Test plan is updated accordingly