[MLIR][ONNX] Add OnnxToTorch support for ReduceSumSquare Op

[archana-ramalingam]

This commit adds the OnnxToTorch support for ReduceSumSquare ops.

[vivekkhandelwal1]

@archana-ramalingam Please clang-format your code.

[vivekkhandelwal1]

Either you can remove this test if its support is not present or add the valid checks. A lit test without any failure or check is not useful. The rest LGTM.

[vivekkhandelwal1]

Apart from a small change, everything else looks fine.

[vivekkhandelwal1]

@archana-ramalingam please rebase your branch.

[vivekkhandelwal1]

@archana-ramalingam, It seems the rebasing is not done properly, I see a lot of code changes not done by you in this PR. Please correct this.

[archana-ramalingam]

@archana-ramalingam, It seems the rebasing is not done properly, I see a lot of code changes not done by you in this PR. Please correct this.

The latest llvm:main wasn't merged into this branch. Now it's fixed.

[vivekkhandelwal1]

@archana-ramalingam, It seems the rebasing is not done properly, I see a lot of code changes not done by you in this PR. Please correct this.

The latest llvm:main wasn't merged into this branch. Now it's fixed.

The PR is still not rebased properly. I see ReduceLogSum changes overwritten by this patch.

[archana-ramalingam]

@archana-ramalingam, It seems the rebasing is not done properly, I see a lot of code changes not done by you in this PR. Please correct this.

The latest llvm:main wasn't merged into this branch. Now it's fixed.

The PR is still not rebased properly. I see ReduceLogSum changes overwritten by this patch.

For this particular conflict, I moved reducelogsum to a different position as both reducesumsquare and reducelogsum were written in the same lines. As you can see I am not adding reducelogsum only moving it alphabetically.