[Torch] add aten.bilinear op decomposing

[dixinzhou]

This PR adds support for aten.bilinear op. The aten.bilinear op is decomposed to aten._trilinear and aten.add according to https://github.com/pytorch/pytorch/blob/main/aten/src/ATen/native/Linear.cpp#L712.

Additionally, this PR fixes a bug in aten._trilinear op decomposition about tensor shape mismatch.

[dixinzhou]

Hi @vivekkhandelwal1. I don't have permission to request review yet. Do you mind taking a look at this change? Thanks!

[dixinzhou]

Hi @vivekkhandelwal1, a gentle reminder to review this pull request when you get a chance. Thank you!

[vivekkhandelwal1]

Hi @vivekkhandelwal1, a gentle reminder to review this pull request when you get a chance. Thank you!

@dixinzhou Is this PR still active and needs a review?

[dixinzhou]

Hi @vivekkhandelwal1, a gentle reminder to review this pull request when you get a chance. Thank you!

@dixinzhou Is this PR still active and needs a review?

Hi @vivekkhandelwal1, thanks for the reply. Yes, this PR still needs to be reviewed and upstreamed.

[dixinzhou]

Hi @vivekkhandelwal1. I have updated the pull request per your review feedback. Do you mind taking another look at this change? Thanks!

[dixinzhou]

Hi @vivekkhandelwal1. I have another round of updates according to your review feedback. Can you take a look? Thanks!

[dixinzhou]

Hi @vivekkhandelwal1. Would you mind taking a look to see if this change is ready to be merged? Thanks!