[PT][StaticRuntime] Move prim op impl to ops.cpp (#48210)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48210
- Move prim op implementation from `ProcessedNode::run` to `getNativeOperation`
- Add out variant for `prim::listConstruct`
Test Plan:
```
buck test //caffe2/test:static_runtime
buck test //caffe2/benchmarks/static_runtime:static_runtime_cpptest
buck test //caffe2/caffe2/fb/predictor:pytorch_predictor_test
buck run mode/dev //caffe2/caffe2/fb/predictor:ptvsc2_predictor_bench -- \
--scripted_model=/home/hlu/ads/adindexer/adindexer_ctr_mobilefeed/pt/merge/traced_precomputation.pt \
--pt_inputs=/home/hlu/ads/adindexer/adindexer_ctr_mobilefeed/pt/merge/container_precomputation_bs1.pt \
--iters=1 --warmup_iters=1 --num_threads=1 --pt_enable_static_runtime=true \
--pt_cleanup_activations=true --pt_enable_out_variant=true
```
Reviewed By: ajyu
Differential Revision: D24748947
fbshipit-source-id: 12caeeae87b69e60505a6cea31786bd96f5c8684
