[Operator Versioning][Edge] Codegen upgrader_mobile.cpp (#69194)
Summary:
From operator version map and upgrader torchscript, generate upgrader_mobile.cpp file. It also includes a unit test.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69194
ghstack-source-id: 145819351
Test Plan:
```
buck test mode/opt //caffe2/test:upgrader_codegen
```
```
buck run mode/opt //caffe2/torch/fb/mobile/upgrader_codegen:upgrader_codegen
```
```
python /Users/chenlai/pytorch/tools/codegen/operator_versions/gen_mobile_upgraders.py
```
Reviewed By: iseeyuan
Differential Revision: D32748985
fbshipit-source-id: f8437766edaba459bfc5e7fc7a3ca0520c4edb9a
