add kmesh custom grafana addon

[YaoZengzeng]

What type of PR is this?

/kind enhancement

What this PR does / why we need it:

Add Kmesh custom grafana addon to display service metrics

Which issue(s) this PR fixes: Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[YaoZengzeng]

/hold

[codecov[bot]]

Codecov Report

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

Project coverage is 49.96%. Comparing base (dd9c90c) to head (c47c16f). Report is 227 commits behind head on main.

see 6 files with indirect coverage changes

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[LiZhenCheng9527]

#688

[YaoZengzeng]

/unhold

[YaoZengzeng]

@hzxuzhonghu PTAL

[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hzxuzhonghu

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• ~~OWNERS~~ [hzxuzhonghu]

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