fix flaky node-skew tests by disabling node autoupgrade

[amacaskill]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug

/kind cleanup

/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:
The node-skew regional tests for PDCSI managed driver are flaky because the nodes auto-upgrade occasionally in the middle of the test, causing random test cases to fail. I fixed this with the gcsfuse CSI driver, and I noticed PDCSI had the same problem.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

None

[amacaskill]

/assign @mattcary

[mattcary]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: amacaskill, mattcary

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