Don't show skipped tests in summary action

[GuptaManan100]

Description

This PR changes the summary action output to not show skipped tests. In the unit tests workflow, we skip quite a few tests, and they pollute the summary actions output, where it's hard to see what actually failed. We most only use the summary action to see failures and not skipped tests, so this PR removes them.

Related Issue(s)

Checklist

• [x] "Backport to:" labels have been added if this change should be back-ported to release branches
• [x] If this change is to be back-ported to previous releases, a justification is included in the PR description
• [x] Tests were added or are not required
• [x] Did the new or modified tests pass consistently locally and on CI?
• [x] Documentation was added or is not required

Deployment Notes

[vitess-bot[bot]]

Review Checklist

Hello reviewers! :wave: Please follow this checklist when reviewing this Pull Request.

General

• [ ] Ensure that the Pull Request has a descriptive title.
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Tests

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