Add shape functions for conv_transpose2d.input and convolution (#80860)
As @silvasean requested in [this issue](https://github.com/llvm/torch-mlir/pull/917#discussion_r896154545) here is the shape code from Torch-MLIR for conv_transpose2d.input and convolution (updated for the transposed case).
Pull Request resolved: https://github.com/pytorch/pytorch/pull/80860
Approved by: https://github.com/Gamrix
