Update the operator version check logic when generating models for testing upgraders (#71894)
Summary:
The model generation script will check the model version, to ensure the developer run the script before they change operator
Previously, the version use the old model version. However, it's hard for developer to know the old version number. In this change, it use the current max operator version to check. It's less strict, but more developer friendly
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71894
ghstack-source-id: 147769215
Test Plan:
first time run:
```
chenlai@devvm5615:~/fbsource/fbcode(b82243650)$ buck run mode/opt //caffe2/torch/fb/mobile/upgrader_codegen:upgrader_test_models_gen
Parsing buck files: finished in 0.7 sec
Downloaded 0/2 artifacts, 0.00 bytes, 100.0% cache miss (for updated rules)
Building: finished in 21.6 sec (100%) 11547/11547 jobs, 2/11547 updated
Total time: 22.4 sec
BUILD SUCCEEDED
TestVersionedDivTensorExampleV7() aten::div.Tensor
INFO:test.jit.fixtures_srcs.generate_models:Processing TestVersionedDivTensorExampleV7
INFO:test.jit.fixtures_srcs.generate_models:Generating model test_versioned_div_tensor_example_v7 and it's save to /data/users/chenlai/fbsource/fbcode/caffe2/test/jit/fixtures/test_versioned_div_tensor_example_v7.ptl
chenlai@devvm5615:~/fbsource/fbcode(b82243650)$
```
second time run:
```
chenlai@devvm5615:~/fbsource/fbcode(b82243650)$ rm caffe2/test/jit/fixtures/test_versioned_div_tensor_example_v4.ptl
chenlai@devvm5615:~/fbsource/fbcode(b82243650)$ buck run mode/opt //caffe2/torch/fb/mobile/upgrader_codegen:upgrader_test_models_gen
Action graph will be rebuilt because files have been added or removed.
Parsing buck files: finished in 2.0 sec
Building... 17.4 sec (99%) 9289/9290 jobs, 0/9290 updated
TestVersionedDivTensorExampleV7() aten::div.Tensor
INFO:test.jit.fixtures_srcs.generate_models:Processing TestVersionedDivTensorExampleV7
INFO:test.jit.fixtures_srcs.generate_models:Model test_versioned_div_tensor_example_v7 already exists, skipping
chenlai@devvm5615:~/fbsource/fbcode(b82243650)$ jf s
```
Reviewed By: tugsbayasgalan
Differential Revision: D33804737
fbshipit-source-id: 7424b81a700703bdf896ec606c2dac8df6dbf8a6
(cherry picked from commit 44b4e37d30077a3160b8a92209af339a6f2fc885)