Revert protobuf dependency update

[alopezz]

What does this PR do?

Revert protobuf dep to version prior to #14594

Motivation

Failing tests after merging to master which somehow the branch's CI missed.

Additional Notes

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached
• If the PR doesn't need to be tested during QA, please add a qa/skip-qa label.

[codecov]

Codecov Report

Merging #14618 (f1d1e7b) into master (a2299e3) will not change coverage.
The diff coverage is n/a.

Flag	Coverage Δ
gitlab_runner	91.94% <ø> (ø)
kube_dns	95.97% <ø> (ø)
kubernetes_state	89.18% <ø> (ø)

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