[SR] Fix aten::split schema (#68135)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68135
Update the schema to reflect the changes in D31935573 (https://github.com/pytorch/pytorch/commit/6b44e75f6bccca7acc8ec31a635f1175c265ac54).
Test Plan:
`buck test caffe2/benchmarks/static_runtime:static_runtime_cpptest`
Confirmed native implementation is used.
Reviewed By: hlu1
Differential Revision: D32326865
fbshipit-source-id: 7f607f57ceb6690a2782d94d9ee736ba64e7d242
