Add decomposition for aten.roll

[tanyokwok]

1. Add aten.roll to torch_ods_gen.py
2. Add decomposition for aten.roll
3. Add decomposition filecheck for aten.roll
4. Add a e2e unit test

[pashu123]

@fortianyou Please add an e2e example.

[silvasean]

Hey MHLO folks, before you add too many new ops, can you please plug in the MHLO backend into the end-to-end tests in our CI? More info here: #1025 (comment)

I'm really worried about adding many new ops without our e2e tests.

[tanyokwok]

can you please plug in the MHLO backend into the end-to-end tests in our CI

Thanks for reminding me @silvasean. I will try to figure out how to add the e2e tests for MHLO in Torch-MLIR CI.

But the PR only added codes to decomposition, and I tried to add e2e UT in the lowering pass of linalg-on-tensors

[tanyokwok]

@pashu123 Can you have a glance at my code? Why is the data type of torch.roll output unknown in the e2e test?

[pashu123]

@pashu123 Can you have a glance at my code? Why is the data type of torch.roll output unknown in the e2e test?

You will have to add the out type in refine types pass.

torch-mlir/lib/Dialect/Torch/Transforms/RefineTypes.cpp

Line 661 in bb47c16

PrimAbsScalarOp, AtenNumpyTOp, AtenTriuOp>(op)) {

[tanyokwok]

@pashu123 @silvasean After rebasing the latest main branch codes, all the tests are passed. Do you have any other comments?

[silvasean]

LGTM! Please make sure to squash all your commits before merging.