[inductor] Add AOTI ABI shim function for torch.nonzero (#110766)
Summary: `torch.nonzero` doesn't have inductor lowering (yet). To invoke the operator in AOT Inductor's ABI compatibility mode we need a dedicated shim function.
Test Plan:
```
$ python test/inductor/test_aot_inductor.py -k test_zero_grid_with_unbacked_symbols
...
----------------------------------------------------------------------
Ran 4 tests in 78.650s
OK
```
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Pull Request resolved: https://github.com/pytorch/pytorch/pull/110766
Approved by: https://github.com/chenyang78
ghstack dependencies: #110713, #110745, #110764