[Experimental] Convert CastLike to Cast when dtype is available | feat(torchlib)

[justinchuby]

Stack from ghstack (oldest at bottom):

• -> [Experimental] Convert CastLike to Cast when dtype is available | feat(torchlib) #1179
• Implement the experimental evaluator for folding branches and castlikes | feat(torchlib) #1178
• Mark some functions as traceable | feat(torchlib) #1177
• Create env to test with TORCHLIB_EXPERIMENTAL_PREFER_TRACING on | test(torchlib) #1180
• Define the EXPERIMENTAL_PREFER_TRACING flag and the traceable option | feat(torchlib) #1176

[codecov]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (ccfe90d) 78.53% compared to head (0d0c11e) 78.48%.

Files	Patch %	Lines
...nxscript/function_libs/torch_lib/graph_building.py	0.00%	7 Missing ⚠️

Additional details and impacted files

@@                    Coverage Diff                     @@
##           gh/justinchuby/47/base    #1179      +/-   ##
==========================================================
- Coverage                   78.53%   78.48%   -0.06%     
==========================================================
  Files                         118      118              
  Lines                       15339    15344       +5     
  Branches                     2396     2397       +1     
==========================================================
- Hits                        12046    12042       -4     
- Misses                       2904     2914      +10     
+ Partials                      389      388       -1     

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[github-actions]

Test Results

         24 files  ±    0         24 suites  ±0   1h 38m 34s ⏱️ - 16m 35s
  11 194 tests ±    0    8 336 ✔️ +17      2 790 💤 +6       68 ❌  -   23 
268 310 runs   - 264  60 407 ✔️  -   3  205 793 💤 ±0  2 110 ❌  - 261 

For more details on these failures, see this check.

Results for commit 0d0c11e. ± Comparison against base commit ccfe90d.