Add castlike to var | fix(torchlib)

[justinchuby]

Follow up of #1186 to fix the dtype mismatch in Sub in the var/var.correction implementation.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e35a179) 78.64% compared to head (85575dc) 78.66%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1195      +/-   ##
==========================================
+ Coverage   78.64%   78.66%   +0.01%     
==========================================
  Files         118      118              
  Lines       15441    15441              
  Branches     2424     2424              
==========================================
+ Hits        12144    12146       +2     
+ Misses       2899     2897       -2     
  Partials      398      398              

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[github-actions]

Test Results

         24 files  ±         0         24 suites  ±0   1h 51m 47s ⏱️ - 2m 1s
  11 254 tests ±         0    8 371 ✔️  -        7      2 876 💤 +         3  7 ❌ +  4 
272 407 runs  +16 636  61 346 ✔️ +4 106  211 054 💤 +12 544  7 ❌  - 14 

For more details on these failures, see this check.

Results for commit 85575dc. ± Comparison against base commit e35a179.

This pull request skips 3 tests.

onnxscript.tests.function_libs.torch_lib.ops_test.TestOutputConsistencyFullGraphCPU ‑ test_output_match_opinfo__var_correction_cpu_float16
onnxscript.tests.function_libs.torch_lib.ops_test.TestOutputConsistencyFullGraphCPU ‑ test_output_match_opinfo__var_correction_cpu_float32
onnxscript.tests.function_libs.torch_lib.ops_test.TestOutputConsistencyFullGraphCPU ‑ test_output_match_opinfo__var_dim_cpu_float16

[titaiwangms]

Also do this in this PR? #1186 (comment)

[justinchuby]

Also do this in this PR? #1186 (comment)

It would be dependent on merging #1192