fix: hide status output when using --output -

[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 #1503

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 86.07%. Comparing base (961e9f8) to head (520fecd).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1506      +/-   ##
==========================================
+ Coverage   86.01%   86.07%   +0.06%     
==========================================
  Files         117      117              
  Lines        4226     4231       +5     
==========================================
+ Hits         3635     3642       +7     
+ Misses        353      351       -2     
  Partials      238      238              

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[shizhMSFT]

This PR is more like a workaround. A more proper way to fix is to adopt the display model defined in https://github.com/oras-project/oras/tree/main/cmd/oras/internal/display.

[TerryHowe]

Maybe https://github.com/oras-project/oras/blob/main/cmd/oras/internal/display/status/discard.go