[llvm] [IR] Add new Range attribute using new ConstantRange Attribute type (PR #83171)

[Nikita Popov via llvm-commits]

nikic wrote:

@andjo403 I don't think trying to manually manage APInt memory here is worthwhile. It's probably easiest to add an extra SpecificBumpPtrAllocator<ConstantRangeAttributeImpl>` in LLVMContextImpl so that it takes care of destruction.

https://github.com/llvm/llvm-project/pull/83171