refactor: apply metadata render interface to oras push command

[wangxiaoxuan273]

What this PR does / why we need it:

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 #1573

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 84.30%. Comparing base (6fe0395) to head (7f81405).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1583      +/-   ##
==========================================
- Coverage   84.33%   84.30%   -0.03%     
==========================================
  Files         120      120              
  Lines        5413     5416       +3     
==========================================
+ Hits         4565     4566       +1     
- Misses        602      604       +2     
  Partials      246      246              

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[qweeah]

LGTM with minor suggestions.