feat: add version metrics for yurt-manager and yurthub components

[rambohe-ch]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line: /kind bug /kind documentation /kind enhancement /kind good-first-issue /kind feature /kind question /kind design /sig ai /sig iot /sig network /sig storage

/kind feature

What this PR does / why we need it:

Add version metrics for yurt-manager and yurthub components. then you can get openyurt_version_info from the following link.

• yurt-manager: curl http://{pod-ip}:10271/metrics
• yurthub: curl http://127.0.0.1:10267/metrics

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

[codecov[bot]]

Codecov Report

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

Project coverage is 56.36%. Comparing base (3713163) to head (1ad0e4c). Report is 14 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2094 +/- ## ========================================== + Coverage 56.09% 56.36% +0.26% ========================================== Files 186 188 +2 Lines 18092 18328 +236 ========================================== + Hits 10149 10330 +181 - Misses 6910 6944 +34 - Partials 1033 1054 +21 ``` | [Flag](https://app.codecov.io/gh/openyurtio/openyurt/pull/2094/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openyurtio) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/openyurtio/openyurt/pull/2094/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openyurtio) | `56.36% <ø> (+0.26%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openyurtio#carryforward-flags-in-the-pull-request-comment) to find out more.

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[zyjhtangtang]

/LGTM