Fix bug regression in experimental value info export

[BowenBao]

Stack from ghstack (oldest at bottom):

• -> Fix bug regression in experimental value info export #1341

Previous fix didn't export subgraph value info.

[codecov]

Codecov Report

Attention: Patch coverage is 86.66667% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 76.03%. Comparing base (e87e05d) to head (ffca06e).

Files	Patch %	Lines
...ipt/function_libs/torch_lib/graph_building_test.py	85.18%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1341      +/-   ##
==========================================
+ Coverage   75.95%   76.03%   +0.07%     
==========================================
  Files         134      134              
  Lines       17773    17777       +4     
  Branches     2927     2933       +6     
==========================================
+ Hits        13500    13517      +17     
+ Misses       3827     3815      -12     
+ Partials      446      445       -1     

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[github-actions]

Test Results

     24 files  ±     0      24 suites  ±0   1h 42m 29s ⏱️ - 8m 38s
 12 984 tests + 1 243   9 294 ✅ +  867    3 688 💤 +   376  2 ❌ ±0 
259 109 runs   - 16 907  59 051 ✅  - 4 226  200 056 💤  - 12 681  2 ❌ ±0 

For more details on these failures, see this check.

Results for commit ffca06e. ± Comparison against base commit e87e05d.