fix: harvester logo is missing in header

[a110605]

Summary

Fixes #15169

fix: harvester logo is missing in header

Occurred changes and/or fixed issues

Previous PR #15256 removed .side-menu-logo: height: 55px causes harvester UI logo missing.

Technical notes summary

Areas or cases that should be tested

Areas which could experience regressions

Screenshot/Video

Before

After

Won't affect rancher logo icon.

Checklist

• The PR is linked to an issue and the linked issue has a Milestone, or no issue is needed
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• The PR has automated tests or clear instructions for manual tests and the linked issue has appropriate QA labels, or tests are not needed
• The PR has reviewed with UX and tested in light and dark mode, or there are no UX changes
• The PR has been reviewed in terms of Accessibility

[houhoucoop]

LGTM