[static runtime] support aten::__getitem__ natively (#55310)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/55310
Test Plan:
Run on the dper generated local/local_ro model
```
./buck-out/opt/gen/caffe2/caffe2/fb/predictor/ptvsc2_predictor_bench --scripted_model=/data/users/ansha/tmp/adfinder/aug_1x/210616848_0.predictor.disagg.local.local_ro.pt --pt_inputs=/data/users/ansha/tmp/adfinder/aug_1x/210616848_0.predictor.disagg.input_data.container.pt --iters=1000 --warmup_iters=10000 --num_threads=1 --pt_enable_static_runtime=1 --pt_cleanup_activations=true --pt_enable_out_variant=1 --pt_optimize_memory=1 --compare_results=0 --do_profile=0 --adsfinder_compatibility=1
```
Reviewed By: hlu1
Differential Revision: D27569662
fbshipit-source-id: df68c2fdd95e39a30aec35ddbaf1f5df0bc3a3da
