[BUG] v2 volume always displays engine upgrade available on UI

[yangchiu]

Describe the bug (🐛 if you encounter this issue)

Install Longhorn master-head (longhorn-manager be08850), and create a v2 volume, always displays engine upgrade available on UI:

But it's actually unable to be upgraded:

To Reproduce

create a v2 volume on Longhorn master-head

Expected behavior

Support bundle for troubleshooting

Environment

• Longhorn version:
• Installation method (e.g. Rancher Catalog App/Helm/Kubectl):
• Kubernetes distro (e.g. RKE/K3s/EKS/OpenShift) and version:
  • Number of management node in the cluster:
  • Number of worker node in the cluster:
• Node config
  • OS type and version:
  • Kernel version:
  • CPU per node:
  • Memory per node:
  • Disk type(e.g. SSD/NVMe/HDD):
  • Network bandwidth between the nodes:
• Underlying Infrastructure (e.g. on AWS/GCE, EKS/GKE, VMWare/KVM, Baremetal):
• Number of Longhorn volumes in the cluster:
• Impacted Longhorn resources:
  • Volume names:

Additional context

[derekbit]

The task is #7445
cc @scures

[innobead]

Duplicated of #7445