[clang-tools-extra] [clang-tidy] Add MLIR check for old op builder usage. (PR #149148)

[Jacques Pienaar via cfe-commits]

jpienaar wrote:

Good question. I think there are a few style things we could flag, but nothing planned. And this current one I'd assume lives for like 6-9 months and then we remove it. Having this flagged on commits to both MLIR & Flang to reduce migration need later. Well I know a couple of downstream projects that would want this too and I'd mass apply this across multiple projects while guarding against new additions before deprecation. I can move to LLVM module and then delete it in like 9 months.

https://github.com/llvm/llvm-project/pull/149148