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

[Mehdi Amini via llvm-commits]

joker-eph wrote:

> Right, but dialect registration is part of the dialect target as well, and depending on just the header would make it not self-contained

I don't follow, can we look at one concrete use-case right now?
Which exact header and which exact link dependency is a problem?

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