chore(deps): update istio/istioctl docker tag to v1.28.0

[renovate]

This PR contains the following updates:

Package	Update	Change
istio/istioctl	minor	1.26.2 -> 1.28.0

---

Warning

Some dependencies could not be looked up. Check the warning logs for more information.

---

Configuration

📅 Schedule: Branch creation - "before 5am every weekday" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.2%. Comparing base (8bc4095) to head (d580d5f).

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #7684     +/-   ##
=======================================
- Coverage   78.5%   78.2%   -0.3%     
=======================================
  Files        222     222             
  Lines      20759   20759             
=======================================
- Hits       16298   16252     -46     
- Misses      3429    3473     +44     
- Partials    1032    1034      +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.