[Static Runtime] Implement prim::TupleUnpack (#63243)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63243
Add `prim::TupleUnpack` native op to static runtime.
Test Plan: Unit test: `buck test caffe2/benchmarks/static_runtime:static_runtime_cpptest`
Reviewed By: hlu1
Differential Revision: D30306955
fbshipit-source-id: 21923d6cbd5545c144ac051b3d48b37ec6e610cf
