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:

• 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]

Codecov Report

All modified and coverable lines are covered by tests ✅

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

Additional details and impacted files

@@            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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[shizhMSFT]

LGTM