longhorn: [IMPROVEMENT] Improve environment_check script for NFS protocol bug and the host system self diagnosis

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The objective of the improvement is to

• Update the KB doc for the NFS bug in kernel 5.15.0-94 (ref)
• Update environment_check script for checking kernel versions (ref)
• Add condition(s) in node.status.conditions to check the environment, like the kernel version
  • After users update their system stuff like the host distro or kernel, they usually skip the environment check. To make it easier for them to spot any known environment problems, we can just run checks in the node controller and note down the status in node.status.conditions.
• Add OS distro and kernel version to logging when mount fails.

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