[nnc] Remove output_args from ReduceOp (#52187)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52187
ReduceOp doesn't need to track the indices that its result will be written into.
ghstack-source-id: 121813075
Test Plan:
test_tensorexpr, tensorexpr_bench
Imported from OSS
Reviewed By: ZolotukhinM
Differential Revision: D26420575
fbshipit-source-id: 7afcfa611515334e36de8039722011687f3b61e4
