make logs of metric clean up

[LiZhenCheng9527]

What type of PR is this? /kind cleanup

What this PR does / why we need it:

Which issue(s) this PR fixes: Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov[bot]]

Codecov Report

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

Project coverage is 52.21%. Comparing base (5ac1b8c) to head (2696711). Report is 9 commits behind head on main.

Files	Coverage Δ
pkg/controller/telemetry/metric.go	55.81% <100.00%> (-0.55%)	:arrow_down:

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[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hzxuzhonghu

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files: - ~~[pkg/controller/OWNERS](https://github.com/kmesh-net/kmesh/blob/main/pkg/controller/OWNERS)~~ [hzxuzhonghu] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment