cockroach-operator: [Regression] Decommission is broken

The statefulset is stopping the pod before cockroach node decommission is being executed, so the node is showing up as failed instead of as decommissioned.

The PVC also gets deleted so there is no way to recover from this state if the scale down caused a loss of quorum because the data gets destroyed.

Steps to reproduce: create 4 node cluster change node count to 3 nodes decommission-regression.log