Pre Ready-For-Testing Checklist

Where is the reproduce steps/test steps documented?
The reproduce steps/test steps are at original ticket description. [IMPROVEMENT] Check NFS versions in /etc/nfsmount.conf instead #9830
Is there a workaround for the issue? If so, where is it documented?
No workaround.
Does the PR include the explanation for the fix or the feature?
See the ticket description.
Does the PR include deployment change (YAML/Chart)? If so, where are the PRs for both YAML file and Chart?
The PR for the YAML & chart change is at: feat(chart): mount host's /etc on Longhorn manager for NFS configuration check (backport #9910) #9936
Have the backend code been merged (Manager, Engine, Instance Manager, BackupStore etc) (including backport-needed/*)?
The PRs are:

Which areas/issues this PR might have potential impacts on?
There's no impact.
If labeled: require/LEP Has the Longhorn Enhancement Proposal PR submitted?
No LEP.
If labeled: area/ui Has the UI issue filed or ready to be merged (including backport-needed/*)?
No UI change.
If labeled: require/doc Has the necessary document PR submitted or merged (including backport-needed/*)?
The documentation issue/PR is at doc(1.8.0, 1.7.3): mount host's /etc on Longhorn manager for NFS configuration check website#1019
If labeled: require/automation-e2e Has the end-to-end test plan been merged? Have QAs agreed on the automation test case? If only test case skeleton w/o implementation, have you created an implementation issue (including backport-needed/*)
No automation.
If labeled: require/automation-engine Has the engine integration test been merged (including backport-needed/*)?
No engine automation PR.
If labeled: require/manual-test-plan Has the manual test plan been documented?
The updated manual test plan is commented below: [IMPROVEMENT] Check NFS versions in /etc/nfsmount.conf instead #9830 (comment)
If the fix introduces the code for backward compatibility Has a separate issue been filed with the label release/obsolete-compatibility?
No compatibility issue.

[BACKPORT][v1.7.3][IMPROVEMENT] Check NFS versions in /etc/nfsmount.conf instead #9831