fix: telemetry ci failed

[zhongwencool]

Fixes

• Improve echo msg for smoke test.
• Fix telemetry_SUITE failed, introduce by fix: telemetry report error on windows #11584

Summary

🤖 Generated by Copilot at 606afc8

Improve error logging in emqx-smoke-test.sh script. The change prints the status code of the curl command that checks emqx API availability.

PR Checklist

Please convert it to a draft if any of the following conditions are not met. Reviewers may skip over until all the items are checked:

• Added tests for the changes
• Added property-based tests for code which performs user input validation
• Changed lines covered in coverage report
• Change log has been added to changes/(ce|ee)/(feat|perf|fix)-<PR-id>.en.md files
• For internal contributor: there is a jira ticket to track this change
• Created PR to emqx-docs if documentation update is required, or link to a follow-up jira ticket
• Schema changes are backward compatible

Checklist for CI (.github/workflows) changes

• If changed package build workflow, pass this action (manual trigger)
• Change log has been added to changes/ dir for user-facing artifacts update