[llvm] [mlir] [MLIR] Generalize expand_shape to take shape as explicit input (PR #69267)

[via llvm-commits]

https://github.com/MaheshRavishankar approved this pull request.

Ok, looks ogod to me. Left a single comment but it is not a blocker and is OK to do it after this PR as well since that part needs to be fixed after this PR lands.

https://github.com/llvm/llvm-project/pull/69267