Record names of contributing values in the constant folding pass

[justinchuby]

Record names of contributing values in the constant folding pass to the newly created output as metadata, so that downstream users like Olive can use the info for further manipulations.

This is useful for Olive to identify transposed lora weights in the graph.

[codecov]

Codecov Report

❌ Patch coverage is 78.94737% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.05%. Comparing base (dddf0c2) to head (6fc4f73).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
onnxscript/optimizer/_constant_folding.py	76.47%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2575   +/-   ##
=======================================
  Coverage   70.04%   70.05%           
=======================================
  Files         223      223           
  Lines       26215    26231   +16     
  Branches     2583     2587    +4     
=======================================
+ Hits        18363    18375   +12     
- Misses       6946     6948    +2     
- Partials      906      908    +2     

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