[release-1.4] Enable vmRolloutStrategy: LiveUpdate for seamless VM upgrades

Summary

Necessary in order to fix kubevirt test pipelines for vm restart : https://gitlab.tech.orange/oln/otc-caas/release/-/pipelines/65733694

related references

Original MR: !4649 (merged)

Details

Pipeline analysis : https://gitlab.tech.orange/oln/otc-caas/release/-/wikis/sched-pipelines-notes/65585849 Ongoing MR for backport : !9172 (merged)