[mlir][arith] Clean up arith canonicalization td rules

- Use `ConstantLikeMatcher` instead of matching `Arith_ConstantOp`
- Reflow some defs to fit the line limit

Suggested by @jpienaar and @Mogball in https://reviews.llvm.org/D139778.

Reviewed By: Mogball

Differential Revision: https://reviews.llvm.org/D139941