NAS-130847 / 24.10-RC.1 / Make vrrp_master more robust wrt iSCSI ALUA on newly booted node (by bmeagherix)

[bugclerk]

Extract some iSCSI ALUA cleanup code into iscsi_cleanup_alua_state and catch exceptions. Further, use the operations that succeeded/failed to act as gatekeepers for later steps.

---

iSCSI tests passed during CI run.

Original PR: https://github.com/truenas/middleware/pull/14364 Jira URL: https://ixsystems.atlassian.net/browse/NAS-130847