[Mlir-commits] [mlir] [mlir][utils] Update generate-test-checks.py (PR #136721)

[Slava Zakharin]

vzakhari wrote:

Thank you for the change! It makes sense to have an option.  I am okay with either default value.

Can you please show an example where such checks may be generated?
```
// CHECK-SAME:      %[[A:[0-9]+|[a-zA-Z$._-][a-zA-Z0-9$._-]*]] = arith.constant 0 : index
```

https://github.com/llvm/llvm-project/pull/136721