[mlir] [MLIR][Linalg] Introduce broadcast/transpose semantic to 'linalg.batc… (PR #122275)

[Andrzej Warzyński]

https://github.com/banach-space approved this pull request.

What I've reviewed so far LGTM % the remaining comments (please address before landing).  I’m relying on @adam-smnk for the rest 😅

I will be OOO for a week, so approving as is to unblock you. Please feel free to merge once all outstanding comments are resolved.

Last but not least, thank you for working on this, @shahidact - this is a non-trivial area, and your work will have a significant impact on Linalg 🙏🏻

https://github.com/llvm/llvm-project/pull/122275