[RELEASE] Regular Tasks for Feature Release v1.8.0

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What's the task? Please describe

Regular tasks for feature release v1.8.0 must be completed well before the release, during the development phase.

For OS distro updates for SLES and SLE Micro, need to update for each patch release as well.

Describe the sub-tasks

• OS Distro Version Update (QA captain)

  • Verify by ci.longhorn.io/job/public/job
  • Update Best Practices>Operating System in the official document and testing pipelines

• K8s Distro Version Update (QA captain)

  • Update the testing pipelines to use the latest supported K8s version (RKE2, K3s)

• BCI Image Update for Component Container Base Image

• Golang Version Update

  • BCI golang image update
  • go.mod update

• Kubernetes Version Update

  • Update the official document with all versions we support
  • Update the minimum version in official document and chart if needed

• Kubernetes Dependent Library Version Update

• CSI Sidecar Version Update

• Support Bundle Kit Version Update

• NFS-Ganesha Version Update

• SPDK Version Update

Additional context

https://github.com/longhorn/longhorn/wiki/Version-Update-Policy