[llvm] [mlir] [mlir] Move InlinerInterface from Transforms to Interfaces. (PR #84878)

[Mehdi Amini via llvm-commits]

joker-eph wrote:

I looked at how we handled these cases before in Bazel, I believe the way to not confuse the tool and not have multiple targets exposing the header was to add them as srcs for the users: https://github.com/llvm/llvm-project/blob/main/utils/bazel/llvm-project-overlay/mlir/BUILD.bazel#L330

https://github.com/llvm/llvm-project/pull/84878