[clang] [CIR] Let ConstantOp builder infer its type automatically (PR #136606)

[Erich Keane via cfe-commits]

erichkeane wrote:

Best I can tell this breaks the CIR build:

```
FAILED: tools/clang/include/clang/CIR/Dialect/IR/CIROpsAttributes.h.inc /local/home/ekeane/llvm-project/build/tools/clang/include/clang/CIR/Dialect/IR/CIROpsAttributes.h.inc 
cd /local/home/ekeane/llvm-project/build && /local/home/ekeane/llvm-project/build/NATIVE/bin/mlir-tblgen -gen-attrdef-decls -I /local/home/ekeane/llvm-project/clang/include/clang/CIR/Dialect/IR -I/local/home/ekeane/llvm-project/clang/include -I/local/home/ekeane/llvm-project/build/tools/clang/include -I/local/home/ekeane/llvm-project/build/include -I/local/home/ekeane/llvm-project/llvm/include -I/local/home/ekeane/llvm-p
roject/llvm/../mlir/include -I/local/home/ekeane/llvm-project/build/tools/mlir/include /local/home/ekeane/llvm-project/clang/include/clang/CIR/Dialect/IR/CIROps.td --write-if-changed -o tools/clang/include/clang/CIR/Dialect/IR/CIROpsAttributes.h.inc -d tools/clang/include/clang/CIR/Dialect/IR/CIROpsAttributes.h.inc.d
Included from /local/home/ekeane/llvm-project/clang/include/clang/CIR/Dialect/IR/CIROps.td:19:
/local/home/ekeane/llvm-project/clang/include/clang/CIR/Dialect/IR/CIRAttrs.td:110:5: error: Using a raw APInt parameter without a custom comparator is not supported because an assert in the equality operator is triggered when the two APInts have different bit widths. This can lead to unexpected crashes. Use an `APIntParameter` or provide a custom comparator.
def IntAttr : CIR_Attr<"Int", "int", [TypedAttrInterface]> {
    ^
```

Do you have a fix for this?

@andykaylor @mmha @bcardosolopes 

https://github.com/llvm/llvm-project/pull/136606