Fix node count in 1.2 deployments

This MR aims on implementing the logic from gitlab.com/sylva-projects/sylva-core/-/merge_requests/4876, into the 1.2 CI values folder, that is being used to test upgrades from release-1.2.

Testing was done under sylva-projects/sylva-core!5179 (merged).

Related to issue sylva-projects/sylva-core#2678 (closed)