[static runtime] Add out_ variant for aten::stack and aten::nan_to_num (#48150)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48150
With D24767322, the remaining ops without out_ variant are pretty much the sparsenn specific ops, which are a bit trickier to add.
Test Plan:
```
buck run //caffe2/test:static_runtime
buck run //caffe2/benchmarks/static_runtime:static_runtime_cpptest
buck run //caffe2/caffe2/fb/predictor:pytorch_predictor_test
buck-out/opt/gen/caffe2/caffe2/fb/predictor/ptvsc2_predictor_bench \
--pred_net=/home/hlu/ads/adindexer/adindexer_ctr_mobilefeed/pt/merge/precomputation_merge_net.pb \
--c2_inputs=/home/hlu/ads/adindexer/adindexer_ctr_mobilefeed/pt/merge/c2_inputs_precomputation_bs1.pb \
--c2_weights=/home/hlu/ads/adindexer/adindexer_ctr_mobilefeed/pt/merge/c2_weights_precomputation.pb \
--scripted_model=/home/hlu/ads/adindexer/adindexer_ctr_mobilefeed/pt/merge/traced_precomputation_partial_dper_fixes.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 \
--eps 1e-2
```
Reviewed By: bwasti
Differential Revision: D25016076
fbshipit-source-id: 59a7948d4cca60182b6755217571128c2fc51f4d
