[Mlir-commits] [mlir] [mlir][arith] adding addition regression tests (PR #96973)

[Jacob Yu]

pingshiyu wrote:

@banach-space thank you for taking your time over the last week (and 8 weeks ago!) going through these PRs! 

I'll add the rest of the tests in the same format, more to come tomorrow - but hopefully should be quicker to review since we have the format established :)

@kuhar, could you please take a look sometime & give a tick if all LGTY?

https://github.com/llvm/llvm-project/pull/96973