[TEST][FEATURE] RWX volume supports different NFS version (4.2) and mount options

[github-actions]

adding/updating auto e2e test cases for #7638 if they can be automated

cc @longhorn/qa

[james-munson]

See also [TEST][IMPROVEMENT} ticket https://github.com//issues/6656

This ticket will also cover the work of that one, to introduce a case with overrides for NFS mount options.

Since NFS v4.1 was and is the default version, the test will specifically override with v4.2.

[longhorn-io-github-bot]

Pre Ready-For-Testing Checklist

• Where is the reproduce steps/test steps documented?
  The reproduce steps/test steps are at:

• Is there a workaround for the issue? If so, where is it documented?
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• Does the PR include the explanation for the fix or the feature?

• 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 change is at:
  The PR for the chart change is at:

• Have the backend code been merged (Manager, Engine, Instance Manager, BackupStore etc) (including backport-needed/*)?
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• Which areas/issues this PR might have potential impacts on?
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  Issues

• If labeled: require/LEP Has the Longhorn Enhancement Proposal PR submitted?
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• If labeled: area/ui Has the UI issue filed or ready to be merged (including backport-needed/*)?
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• If labeled: require/doc Has the necessary document PR submitted or merged (including backport-needed/*)?
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• 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/*)
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• If labeled: require/automation-engine Has the engine integration test been merged (including backport-needed/*)?
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• If labeled: require/manual-test-plan Has the manual test plan been documented?
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• If the fix introduces the code for backward compatibility Has a separate issue been filed with the label release/obsolete-compatibility?
  The compatibility issue is filed at

[james-munson]

test_rwx_volume_mount_options has passed reliably in the longhorn-tests regression runs since it was committed. Marking this ticket as Closed.