[torchlib] Add trace_only flag to aten_copy, aten_tril, aten_triu

[justinchuby]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.10%. Comparing base (e67eeef) to head (0317030).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2572   +/-   ##
=======================================
  Coverage   70.09%   70.10%           
=======================================
  Files         222      222           
  Lines       26184    26184           
  Branches     2581     2581           
=======================================
+ Hits        18353    18355    +2     
+ Misses       6931     6929    -2     
  Partials      900      900           

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