feat: add pushed tags to metadata

[qweeah]

What this PR does / why we need it: This PRs adds pushed tags into the metadata output of oras push

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Fixes #1341

Please check the following list:

• [x] Does the affected code have corresponding tests, e.g. unit test, E2E test?
• [ ] Does this change require a documentation update?
• [ ] Does this introduce breaking changes that would require an announcement or bumping the major version?
• [ ] Do all new files have an appropriate license header?

[codecov[bot]]

Codecov Report

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

Project coverage is 84.91%. Comparing base (9ab9e56) to head (8fa8de6).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1346 +/- ## ========================================== + Coverage 84.76% 84.91% +0.15% ========================================== Files 104 107 +3 Lines 3715 3739 +24 ========================================== + Hits 3149 3175 +26 + Misses 338 336 -2 Partials 228 228 ```

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