Update debian-base image to v1.4.3

[saschagrunert]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Update the debian base image to the latest release.

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

None

Does this PR introduce a user-facing change?:

None

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @saschagrunert. Thanks for your PR.

I'm waiting for a kubernetes-csi member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[andyzhangx]

/ok-to-test

[coveralls]

Pull Request Test Coverage Report for Build 4242390593

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 85.744%

---

Totals
Change from base Build 4219216179:	0.0%
Covered Lines:	812
Relevant Lines:	947

---

💛 - Coveralls

[andyzhangx]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx, saschagrunert

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Needs approval from an approver in each of these files:

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