Update grpc-health-probe to v0.4.28 in Dockerfiles

[rh-tcloud]

Description of the change: Update grpc-health-probe to latest release.

Motivation for the change: Closes #1410

Reviewer Checklist

• [ ] Implementation matches the proposed design, or proposal is updated to match implementation
• [ ] Sufficient unit test coverage
• [ ] Sufficient end-to-end test coverage
• [ ] Docs updated or added to /docs
• [ ] Commit messages sensible and descriptive

[openshift-ci[bot]]

Hi @rh-tcloud. Thanks for your PR.

I'm waiting for a operator-framework 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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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 48.23%. Comparing base (2e0d6a2) to head (905580f). Report is 5 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1425 +/- ## ======================================= Coverage 48.23% 48.23% ======================================= Files 136 136 Lines 12805 12805 ======================================= Hits 6176 6176 Misses 5594 5594 Partials 1035 1035 ```

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[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: perdasilva, rh-tcloud

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