[CI] Run test_torchinductor for MPS device (#150821)

There are only 118 failures atm, mark them all with xfail to avoid new regressions

Add `xfail_if_mps_unimplemented` decorator to distinguish between tests that call unimplemented eager op vs ones that fail for some other reason.

Added `aten._scaled_dot_product_attention_math_for_mps` fallback to make test behavior consistent between MacOS-15 (where falback is in place) and MacOS-14

Weird MacOS-14 specific skips:
- test_torchinductor.py::GPUTests::test_cat_extern_kernel_mps
- test_torchinductor.py::GPUTests::test_sort_transpose_mps (likely an eager bug)
- test_torchinductor.py::GPUTests::test_unaligned_input_mps

Numerous MacOS-13 skips, including few eager hard crashes, for example running `test_torchinductor.py::GPUTests::test_scatter5_mps` causes
```
/AppleInternal/Library/BuildRoots/c651a45f-806e-11ed-a221-7ef33c48bc85/Library/Caches/com.apple.xbs/Sources/MetalPerformanceShaders/MPSNDArray/Kernels/MPSNDArrayScatter.mm:309: failed assertion `Rank of destination array (1) must be greater than or equal to inner-most dimension of indices array (3)'
```

Pull Request resolved: https://github.com/pytorch/pytorch/pull/150821
Approved by: https://github.com/ZainRizvi, https://github.com/dcci
ghstack dependencies: #151224, #151246, #151272, #151282, #151288

test/run_test.py

@@ -1532,6 +1532,7 @@ def get_selected_tests(options) -> list[str]:
             "test_view_ops",
             "test_nn",
             "inductor/test_mps_basic",
+            "inductor/test_torchinductor",
         ]
     else:
         # Exclude all mps tests otherwise